{"id":6379,"date":"2026-02-04T17:41:50","date_gmt":"2026-02-04T09:41:50","guid":{"rendered":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/"},"modified":"2026-02-04T17:41:50","modified_gmt":"2026-02-04T09:41:50","slug":"navigating-system-complexity-determining-the-levels-of-data-flow-diagrams","status":"publish","type":"post","link":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/","title":{"rendered":"\u0110i\u1ec1u h\u01b0\u1edbng \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng: X\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ea5p \u0111\u1ed9 c\u1ee7a s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u"},"content":{"rendered":"<h2><strong>Gi\u1edbi thi\u1ec7u<\/strong><\/h2>\n<p>Trong l\u0129nh v\u1ef1c ph\u00e2n t\u00edch v\u00e0 m\u00f4 h\u00ecnh h\u00f3a h\u1ec7 th\u1ed1ng,<a href=\"https:\/\/www.visual-paradigm.com\/guide\/data-flow-diagram\/what-is-data-flow-diagram\/\">S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u<\/a> (DFDs) \u0111\u00f3ng vai tr\u00f2 l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 l\u00e0m r\u00f5 nh\u1eefng chi ti\u1ebft ph\u1ee9c t\u1ea1p v\u1ec1 lu\u1ed3ng th\u00f4ng tin v\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh b\u00ean trong m\u1ed9t h\u1ec7 th\u1ed1ng. Tuy nhi\u00ean, th\u00e1ch th\u1ee9c n\u1eb1m \u1edf vi\u1ec7c t\u00ecm \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng ph\u00f9 h\u1ee3p gi\u1eefa vi\u1ec7c cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan c\u1ea5p cao v\u00e0 \u0111i s\u00e2u v\u00e0o chi ti\u1ebft c\u1ee5 th\u1ec3. Cu\u1ed9c th\u1ea3o lu\u1eadn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 trong DFD, \u0111\u01b0a ra nh\u1eefng hi\u1ec3u bi\u1ebft v\u1ec1 vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh qu\u00e1 tr\u00ecnh v\u1ebd s\u01a1 \u0111\u1ed3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u ri\u00eang bi\u1ec7t c\u1ee7a t\u1eebng d\u1ef1 \u00e1n.<\/p>\n<p id=\"diLukNL\"><img fetchpriority=\"high\" alt=\"\" class=\"alignnone size-full wp-image-2749\" decoding=\"async\" fetchpriority=\"high\" height=\"327\" src=\"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/10\/img_6525fa765caea.png\" width=\"871\"\/><\/p>\n<h2>Ph\u00e2n r\u00e3 h\u1ec7 th\u1ed1ng b\u1eb1ng DFD<\/h2>\n<p><strong>1. S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh:<\/strong><\/p>\n<ul>\n<li><strong>T\u1ed5ng quan:<\/strong>S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh cung c\u1ea5p c\u00e1i nh\u00ecn c\u1ea5p cao v\u1ec1 to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i l\u00e0 ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u, \u0111\u1ea1i di\u1ec7n cho c\u00e1c h\u1ec7 th\u1ed1ng, con ng\u01b0\u1eddi ho\u1eb7c t\u1ed5 ch\u1ee9c n\u1eb1m ngo\u00e0i h\u1ec7 th\u1ed1ng.<\/li>\n<li><strong>C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng:<\/strong>\n<ul>\n<li><strong>Qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):<\/strong>\u0110\u1ea1i di\u1ec7n cho c\u00e1c qu\u00e1 tr\u00ecnh trong h\u1ec7 th\u1ed1ng.<\/li>\n<li><strong>Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):<\/strong>\u0110\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u.<\/li>\n<li><strong>Lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):<\/strong>\u0110\u1ea1i di\u1ec7n cho lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh v\u00e0 c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>2. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p 1:<\/strong><\/p>\n<ul>\n<li><strong>T\u1ed5ng quan:<\/strong>S\u01a1 \u0111\u1ed3 DFD c\u1ea5p 1 cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft h\u01a1n so v\u1edbi s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh. Ch\u00fang chia nh\u1ecf h\u1ec7 th\u1ed1ng th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh v\u00e0 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c kho d\u1eef li\u1ec7u ch\u00ednh.<\/li>\n<li><strong>C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng:<\/strong>\n<ul>\n<li><strong>Qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):<\/strong>\u0110\u1ea1i di\u1ec7n cho c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh b\u00ean trong h\u1ec7 th\u1ed1ng.<\/li>\n<li><strong>Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):<\/strong>V\u1eabn \u0111\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u.<\/li>\n<li><strong>Kho d\u1eef li\u1ec7u (c\u00e1c \u0111\u01b0\u1eddng song song):<\/strong>\u0110\u1ea1i di\u1ec7n cho c\u00e1c kho l\u01b0u tr\u1eef n\u01a1i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef.<\/li>\n<li><strong>Lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):<\/strong>Hi\u1ec3n th\u1ecb lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 kho d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>3. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p 2 (v\u00e0 th\u1ea5p h\u01a1n):<\/strong><\/p>\n<ul>\n<li><strong>T\u1ed5ng quan:<\/strong>Th\u00f4ng qua m\u1ed9t k\u1ef9 thu\u1eadt g\u1ecdi l\u00e0 \u201cc\u1ea5p \u0111\u1ed9 h\u00f3a,\u201d s\u1ef1 ph\u1ee9c t\u1ea1p chi ti\u1ebft c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd b\u1eb1ng c\u00e1ch t\u1ea1o ra m\u1ed9t c\u1ea5p \u0111\u1ed9 c\u00e1c tr\u1eebu t\u01b0\u1ee3ng. C\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p \u0111\u1ed9 2 v\u00e0 c\u00e1c c\u1ea5p \u0111\u1ed9 th\u1ea5p h\u01a1n cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft h\u01a1n v\u1ec1 h\u1ec7 th\u1ed1ng, ph\u00e2n chia c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con v\u00e0 chi ti\u1ebft h\u00f3a th\u00eam v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u.<\/li>\n<li><strong>C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng:<\/strong>\n<ul>\n<li><strong>C\u00e1c qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):<\/strong>Ph\u00e2n chia th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con chi ti\u1ebft h\u01a1n.<\/li>\n<li><strong>C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):<\/strong>Gi\u1eef vai tr\u00f2 l\u00e0 ngu\u1ed3n ho\u1eb7c \u0111i\u1ec3m \u0111\u1ebfn c\u1ee7a d\u1eef li\u1ec7u.<\/li>\n<li><strong>C\u00e1c kho d\u1eef li\u1ec7u (c\u00e1c \u0111\u01b0\u1eddng song song):<\/strong>V\u1eabn ti\u1ebfp t\u1ee5c bi\u1ec3u di\u1ec5n c\u00e1c kho l\u01b0u tr\u1eef d\u1eef li\u1ec7u.<\/li>\n<li><strong>C\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):<\/strong>Hi\u1ec7n th\u1ecb c\u00e1c \u0111\u01b0\u1eddng \u0111i chi ti\u1ebft c\u1ee7a lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>T\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u:<\/strong><\/p>\n<ol>\n<li><strong>X\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i:<\/strong>B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a ch\u00fang v\u1edbi h\u1ec7 th\u1ed1ng.<\/li>\n<li><strong>X\u00e1c \u0111\u1ecbnh c\u00e1c qu\u00e1 tr\u00ecnh:<\/strong>X\u00e1c \u0111\u1ecbnh v\u00e0 \u0111\u1ecbnh ngh\u0129a c\u00e1c qu\u00e1 tr\u00ecnh ch\u00ednh trong h\u1ec7 th\u1ed1ng. \u0110\u1ed1i v\u1edbi s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh, \u0111\u00e2y l\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh c\u1ea5p cao, v\u00e0 \u0111\u1ed1i v\u1edbi c\u1ea5p \u0111\u1ed9 1 v\u00e0 th\u1ea5p h\u01a1n, ch\u00fang tr\u1edf n\u00ean chi ti\u1ebft h\u01a1n.<\/li>\n<li><strong>X\u00e1c \u0111\u1ecbnh c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u:<\/strong>Thi\u1ebft l\u1eadp c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. X\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o cho m\u1ed7i qu\u00e1 tr\u00ecnh v\u00e0 d\u1eef li\u1ec7u \u0111\u1ea7u ra.<\/li>\n<li><strong>X\u00e1c \u0111\u1ecbnh c\u00e1c kho d\u1eef li\u1ec7u:<\/strong>Nh\u1eadn di\u1ec7n c\u00e1c kho d\u1eef li\u1ec7u n\u01a1i th\u00f4ng tin \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 truy xu\u1ea5t.<\/li>\n<li><strong>V\u1ebd s\u01a1 \u0111\u1ed3:<\/strong>S\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u ph\u00f9 h\u1ee3p \u0111\u1ec3 t\u1ea1o s\u01a1 \u0111\u1ed3. C\u00e1c s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh t\u1eadp trung v\u00e0o c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ea5p cao, s\u01a1 \u0111\u1ed3 c\u1ea5p \u0111\u1ed9 1 cung c\u1ea5p chi ti\u1ebft h\u01a1n, v\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 c\u1ea5p th\u1ea5p h\u01a1n chia nh\u1ecf c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh chi ti\u1ebft tinh vi h\u01a1n.<\/li>\n<li><strong>C\u1ea5p \u0111\u1ed9 h\u00f3a:<\/strong>N\u1ebfu c\u1ea7n, \u00e1p d\u1ee5ng c\u1ea5p \u0111\u1ed9 h\u00f3a \u0111\u1ec3 qu\u1ea3n l\u00fd \u0111\u1ed9 ph\u1ee9c t\u1ea1p. Chia nh\u1ecf c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con v\u00e0 t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 DFD c\u1ea5p th\u1ea5p h\u01a1n.<\/li>\n<\/ol>\n<p><strong>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9:<\/strong><\/p>\n<ul>\n<li><strong>\u0110\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng:<\/strong>H\u1ec7 th\u1ed1ng c\u00e0ng ph\u1ee9c t\u1ea1p, s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 c\u1ea7n thi\u1ebft \u0111\u1ec3 ghi nh\u1eadn \u0111\u1ea7y \u0111\u1ee7 chi ti\u1ebft c\u00e0ng nhi\u1ec1u.<\/li>\n<li><strong>Y\u00eau c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n:<\/strong>M\u1ee9c \u0111\u1ed9 chi ti\u1ebft m\u00e0 c\u00e1c b\u00ean li\u00ean quan v\u00e0 y\u00eau c\u1ea7u d\u1ef1 \u00e1n y\u00eau c\u1ea7u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t. N\u1ebfu c\u00e1c b\u00ean li\u00ean quan c\u1ea7n hi\u1ec3u r\u00f5 chi ti\u1ebft v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh, c\u00f3 th\u1ec3 c\u1ea7n th\u00eam nhi\u1ec1u c\u1ea5p \u0111\u1ed9 h\u01a1n.<\/li>\n<li><strong>Ph\u1ea1m vi d\u1ef1 \u00e1n:<\/strong>Ph\u1ea1m vi d\u1ef1 \u00e1n c\u0169ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9. C\u00e1c d\u1ef1 \u00e1n quy m\u00f4 l\u1edbn ho\u1eb7c c\u00e1c h\u1ec7 th\u1ed1ng c\u1ea5p doanh nghi\u1ec7p c\u00f3 th\u1ec3 c\u1ea7n nhi\u1ec1u c\u1ea5p \u0111\u1ed9 h\u01a1n \u0111\u1ec3 ghi nh\u1eadn m\u1ecdi chi ti\u1ebft ph\u1ee9c t\u1ea1p.<\/li>\n<li><strong>C\u00e2n b\u1eb1ng gi\u1eefa s\u1ef1 r\u00f5 r\u00e0ng v\u00e0 chi ti\u1ebft:<\/strong>C\u00f3 m\u1ed9t s\u1ef1 c\u00e2n b\u1eb1ng tinh t\u1ebf gi\u1eefa vi\u1ec7c cung c\u1ea5p \u0111\u1ee7 chi ti\u1ebft cho ph\u00e2n t\u00edch v\u00e0 tr\u00e1nh s\u1ef1 ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft. S\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 c\u1ea7n ph\u1ea3i \u0111\u1ee7 \u0111\u1ec3 m\u00f4 t\u1ea3 ch\u00ednh x\u00e1c h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng l\u00e0m qu\u00e1 t\u1ea3i c\u00e1c b\u00ean li\u00ean quan.<\/li>\n<\/ul>\n<p><strong>M\u1eb9o:<\/strong><\/p>\n<ul>\n<li><strong>T\u00ednh nh\u1ea5t qu\u00e1n:<\/strong>Duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n trong c\u00e1c bi\u1ec3u t\u01b0\u1ee3ng v\u00e0 k\u00fd hi\u1ec7u xuy\u00ean su\u1ed1t c\u00e1c s\u01a1 \u0111\u1ed3.<\/li>\n<li><strong>S\u1ef1 r\u00f5 r\u00e0ng:<\/strong>\u0110\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c s\u01a1 \u0111\u1ed3 r\u00f5 r\u00e0ng v\u00e0 d\u1ec5 hi\u1ec3u \u0111\u1ed1i v\u1edbi c\u00e1c b\u00ean li\u00ean quan.<\/li>\n<\/ul>\n<p>H\u00e3y nh\u1edb, m\u1ee5c ti\u00eau c\u1ee7a DFD l\u00e0 m\u00f4 h\u00ecnh h\u00f3a c\u00e1c quy tr\u00ecnh h\u1ec7 th\u1ed1ng v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u theo c\u00e1ch m\u00e0 c\u1ea3 c\u00e1c b\u00ean li\u00ean quan k\u1ef9 thu\u1eadt v\u00e0 phi k\u1ef9 thu\u1eadt \u0111\u1ec1u c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c. B\u1eb1ng c\u00e1ch tu\u00e2n theo c\u00e1c b\u01b0\u1edbc n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c DFD gi\u00fap truy\u1ec1n \u0111\u1ea1t hi\u1ec7u qu\u1ea3 c\u1ea5u tr\u00fac v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng.<\/p>\n<p><strong>C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t:<\/strong><\/p>\n<ul>\n<li><strong>Ph\u01b0\u01a1ng ph\u00e1p l\u1eb7p l\u1ea1i:<\/strong>B\u1eaft \u0111\u1ea7u b\u1eb1ng m\u1ed9t DFD c\u1ea5p cao h\u01a1n v\u00e0 t\u1eebng b\u01b0\u1edbc tinh ch\u1ec9nh n\u00f3 d\u1ef1a tr\u00ean ph\u1ea3n h\u1ed3i v\u00e0 s\u1ef1 hi\u1ec3u bi\u1ebft ng\u00e0y c\u00e0ng s\u00e2u s\u1eafc v\u1ec1 h\u1ec7 th\u1ed1ng.<\/li>\n<li><strong>S\u1ef1 tham gia c\u1ee7a b\u00ean li\u00ean quan:<\/strong>Tham gia c\u00e1c b\u00ean li\u00ean quan v\u00e0o qu\u00e1 tr\u00ecnh ra quy\u1ebft \u0111\u1ecbnh v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9. \u00dd ki\u1ebfn c\u1ee7a h\u1ecd c\u00f3 th\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng m\u1ee9c \u0111\u1ed9 chi ti\u1ebft c\u1ea7n thi\u1ebft \u0111\u1ec3 truy\u1ec1n \u0111\u1ea1t hi\u1ec7u qu\u1ea3.<\/li>\n<li><strong>T\u00e0i li\u1ec7u:<\/strong>Ghi r\u00f5 m\u1ee5c \u0111\u00edch v\u00e0 ph\u1ea1m vi c\u1ee7a t\u1eebng c\u1ea5p \u0111\u1ed9. \u0110i\u1ec1u n\u00e0y gi\u00fap c\u00e1c b\u00ean li\u00ean quan hi\u1ec3u \u0111\u01b0\u1ee3c m\u1ed7i DFD \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec1u g\u00ec v\u00e0 n\u00f3 ph\u00f9 h\u1ee3p nh\u01b0 th\u1ebf n\u00e0o v\u00e0o ph\u00e2n t\u00edch t\u1ed5ng th\u1ec3.<\/li>\n<\/ul>\n<h2><strong>T\u1ea1o s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng<\/strong><\/h2>\n<p><strong>Kh\u01a1i d\u1eady s\u1ee9c m\u1ea1nh c\u1ee7a c\u00f4ng c\u1ee5 tr\u1ef1c tuy\u1ebfn Visual Paradigm<\/strong><\/p>\n<p>Trong b\u1ed1i c\u1ea3nh \u0111\u1ed9ng c\u1ee7a k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin kinh doanh, kh\u1ea3 n\u0103ng di\u1ec5n gi\u1ea3i s\u1ef1 di chuy\u1ec3n c\u1ee7a d\u1eef li\u1ec7u l\u00e0 \u0111i\u1ec1u then ch\u1ed1t. B\u1eaft \u0111\u1ea7u v\u1edbi S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD), nh\u1eefng bi\u1ec3u di\u1ec5n tr\u1ef1c quan m\u1ea1nh m\u1ebd gi\u00fap l\u00e0m s\u00e1ng t\u1ecf lu\u1ed3ng th\u00f4ng tin b\u00ean trong m\u1ed9t h\u1ec7 th\u1ed1ng. \u0110\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a v\u00e0 t\u0103ng t\u1ed1c qu\u00e1 tr\u00ecnh t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y,<a href=\"http:\/\/visual-paradigm.com\">Visual Paradigm<\/a> cung c\u1ea5p m\u1ed9t <a href=\"https:\/\/online.visual-paradigm.com\/diagrams\/features\/dfd-maker\/\">c\u00f4ng c\u1ee5 DFD tr\u1ef1c tuy\u1ebfn<\/a>gi\u00fap \u0111\u1ea3m b\u1ea3o t\u1ed1c \u0111\u1ed9, s\u1ef1 r\u00f5 r\u00e0ng v\u00e0 t\u00ednh chuy\u00ean nghi\u1ec7p trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n s\u01a1 \u0111\u1ed3. H\u00e3y c\u00f9ng kh\u00e1m ph\u00e1 nh\u1eefng t\u00ednh n\u0103ng khi\u1ebfn Visual Paradigm tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u \u0111\u1ec3 t\u1ea1o DFD m\u1ed9t c\u00e1ch tr\u01a1n tru.<\/p>\n<p><a href=\"http:\/\/online.visual-paradigm.com\">C\u00f4ng c\u1ee5 tr\u1ef1c tuy\u1ebfn c\u1ee7a Visual Paradigm<\/a>C\u00f4ng c\u1ee5 t\u1ea1o s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u tr\u1ef1c tuy\u1ebfn c\u1ee7a Visual Paradigm tr\u1edf th\u00e0nh gi\u1ea3i ph\u00e1p h\u00e0ng \u0111\u1ea7u cho c\u1ea3 chuy\u00ean gia l\u1eabn ng\u01b0\u1eddi \u0111am m\u00ea. C\u00f4ng c\u1ee5 n\u00e0y h\u1ed7 tr\u1ee3 vi\u1ec7c t\u1ea1o nhanh ch\u00f3ng c\u00e1c s\u01a1 \u0111\u1ed3 DFD r\u00f5 r\u00e0ng v\u00e0 s\u00fac t\u00edch, \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec3u r\u00f5 vi\u1ec7c chuy\u1ec3n giao d\u1eef li\u1ec7u gi\u1eefa c\u00e1c quy tr\u00ecnh, kho d\u1eef li\u1ec7u v\u00e0 c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i trong m\u1ed9t h\u1ec7 th\u1ed1ng th\u00f4ng tin kinh doanh.<\/p>\n<p>D\u00f9 b\u1ea1n l\u00e0 m\u1ed9t k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m c\u00f3 kinh nghi\u1ec7m hay ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u v\u1edbi DFD, c\u00f4ng c\u1ee5 c\u1ee7a Visual Paradigm cung c\u1ea5p n\u1ec1n t\u1ea3ng tr\u1ef1c quan \u0111\u1ec3 v\u1ebd v\u00e0 ch\u1ec9nh s\u1eeda DFD m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng. V\u1edbi m\u1ed9t kho t\u00e0i li\u1ec7u phong ph\u00fa \u0111\u1ec3 l\u1ea5y c\u1ea3m h\u1ee9ng, c\u00f4ng c\u1ee5 n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c DFD c\u1ee7a b\u1ea1n kh\u00f4ng ch\u1ec9 mang t\u00ednh th\u00f4ng tin m\u00e0 c\u00f2n h\u1ea5p d\u1eabn v\u1ec1 m\u1eb7t th\u1ecb gi\u00e1c. H\u00e3y ch\u1ecdn th\u00f4ng minh \u2014 h\u00e3y t\u1eadn d\u1ee5ng c\u00f4ng c\u1ee5 t\u1ea1o s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u tr\u1ef1c tuy\u1ebfn c\u1ee7a Visual Paradigm \u0111\u1ec3 c\u00f3 tr\u1ea3i nghi\u1ec7m v\u1ebd s\u01a1 \u0111\u1ed3 tr\u01a1n tru v\u00e0 chuy\u00ean nghi\u1ec7p.<\/p>\n<h1 class=\"template-page-title-h1\">M\u1eabu s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u<\/h1>\n<p>B\u1eaft \u0111\u1ea7u thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n v\u1edbi c\u00e1c <a href=\"https:\/\/online.visual-paradigm.com\/diagrams\/templates\/data-flow-diagram\/\">m\u1eabu s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u chuy\u00ean nghi\u1ec7p<\/a><\/p>\n<p id=\"VgtWaYK\"><img alt=\"\" class=\"alignnone size-full wp-image-2750\" decoding=\"async\" height=\"337\" src=\"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/10\/img_6525faab86b6d.png\" width=\"1676\"\/><\/p>\n<p>\u00a0<\/p>\n<h2><strong>T\u00f3m t\u1eaft<\/strong><\/h2>\n<p>Vi\u1ec7c quy\u1ebft \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 DFD c\u1ea7n t\u00edch h\u1ee3p l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh tinh t\u1ebf, b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng, y\u00eau c\u1ea7u d\u1ef1 \u00e1n v\u00e0 nhu c\u1ea7u c\u1ee7a c\u00e1c b\u00ean li\u00ean quan. H\u00e0nh tr\u00ecnh th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u t\u1eeb S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh (c\u1ea5p \u0111\u1ed9 0), cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan v\u1ec1 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<p>Theo m\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng, s\u01a1 \u0111\u1ed3 DFD c\u1ea5p 1 cung c\u1ea5p s\u1ef1 ph\u00e2n t\u00edch chi ti\u1ebft h\u01a1n. Ph\u01b0\u01a1ng ph\u00e1p l\u1eb7p l\u1ea1i v\u00e0 s\u1ef1 tham gia c\u1ee7a c\u00e1c b\u00ean li\u00ean quan \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c tinh ch\u1ec9nh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9, \u0111\u1ea3m b\u1ea3o m\u1ed7i c\u1ea5p \u0111\u1ed9 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng ph\u00f9 h\u1ee3p gi\u1eefa \u0111\u1ed9 r\u00f5 r\u00e0ng v\u00e0 chi ti\u1ebft. Cu\u1ed1i c\u00f9ng, m\u1ee5c ti\u00eau l\u00e0 t\u1ea1o ra m\u1ed9t b\u1ed9 s\u01a1 \u0111\u1ed3 DFD to\u00e0n di\u1ec7n, gi\u00fap truy\u1ec1n \u0111\u1ea1t hi\u1ec7u qu\u1ea3 ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng l\u00e0m qu\u00e1 t\u1ea3i c\u00e1c b\u00ean li\u00ean quan.<\/p>\n<p>\u00a0<\/p>\n<p>\u00a0<\/p>\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gi\u1edbi thi\u1ec7u Trong l\u0129nh v\u1ef1c ph\u00e2n t\u00edch v\u00e0 m\u00f4 h\u00ecnh h\u00f3a h\u1ec7 th\u1ed1ng,S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFDs) \u0111\u00f3ng vai tr\u00f2 l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 l\u00e0m r\u00f5 nh\u1eefng chi ti\u1ebft ph\u1ee9c t\u1ea1p v\u1ec1 lu\u1ed3ng th\u00f4ng tin v\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh b\u00ean trong m\u1ed9t h\u1ec7 th\u1ed1ng. Tuy nhi\u00ean, th\u00e1ch th\u1ee9c n\u1eb1m \u1edf vi\u1ec7c t\u00ecm \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng ph\u00f9 h\u1ee3p gi\u1eefa vi\u1ec7c cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan c\u1ea5p cao v\u00e0 \u0111i s\u00e2u v\u00e0o chi ti\u1ebft c\u1ee5 th\u1ec3. Cu\u1ed9c th\u1ea3o lu\u1eadn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 trong DFD, \u0111\u01b0a ra nh\u1eefng hi\u1ec3u bi\u1ebft v\u1ec1 vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh qu\u00e1 tr\u00ecnh v\u1ebd s\u01a1 \u0111\u1ed3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u ri\u00eang bi\u1ec7t c\u1ee7a t\u1eebng d\u1ef1 \u00e1n. Ph\u00e2n r\u00e3 h\u1ec7 th\u1ed1ng b\u1eb1ng DFD 1. S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh: T\u1ed5ng quan:S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh cung c\u1ea5p c\u00e1i nh\u00ecn c\u1ea5p cao v\u1ec1 to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i l\u00e0 ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u, \u0111\u1ea1i di\u1ec7n cho c\u00e1c h\u1ec7 th\u1ed1ng, con ng\u01b0\u1eddi ho\u1eb7c t\u1ed5 ch\u1ee9c n\u1eb1m ngo\u00e0i h\u1ec7 th\u1ed1ng. C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng: Qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):\u0110\u1ea1i di\u1ec7n cho c\u00e1c qu\u00e1 tr\u00ecnh trong h\u1ec7 th\u1ed1ng. Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):\u0110\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u. Lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):\u0110\u1ea1i di\u1ec7n cho lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh v\u00e0 c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. 2. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p 1: T\u1ed5ng quan:S\u01a1 \u0111\u1ed3 DFD c\u1ea5p 1 cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft h\u01a1n so v\u1edbi s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh. Ch\u00fang chia nh\u1ecf h\u1ec7 th\u1ed1ng th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh v\u00e0 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c kho d\u1eef li\u1ec7u ch\u00ednh. C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng: Qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):\u0110\u1ea1i di\u1ec7n cho c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh b\u00ean trong h\u1ec7 th\u1ed1ng. Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):V\u1eabn \u0111\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u. Kho d\u1eef li\u1ec7u (c\u00e1c \u0111\u01b0\u1eddng song song):\u0110\u1ea1i di\u1ec7n cho c\u00e1c kho l\u01b0u tr\u1eef n\u01a1i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef. Lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):Hi\u1ec3n th\u1ecb lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 kho d\u1eef li\u1ec7u. 3. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p 2 (v\u00e0 th\u1ea5p h\u01a1n): T\u1ed5ng quan:Th\u00f4ng qua m\u1ed9t k\u1ef9 thu\u1eadt g\u1ecdi l\u00e0 \u201cc\u1ea5p \u0111\u1ed9 h\u00f3a,\u201d s\u1ef1 ph\u1ee9c t\u1ea1p chi ti\u1ebft c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd b\u1eb1ng c\u00e1ch t\u1ea1o ra m\u1ed9t c\u1ea5p \u0111\u1ed9 c\u00e1c tr\u1eebu t\u01b0\u1ee3ng. C\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p \u0111\u1ed9 2 v\u00e0 c\u00e1c c\u1ea5p \u0111\u1ed9 th\u1ea5p h\u01a1n cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft h\u01a1n v\u1ec1 h\u1ec7 th\u1ed1ng, ph\u00e2n chia c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con v\u00e0 chi ti\u1ebft h\u00f3a th\u00eam v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng: C\u00e1c qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):Ph\u00e2n chia th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con chi ti\u1ebft h\u01a1n. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):Gi\u1eef vai tr\u00f2 l\u00e0 ngu\u1ed3n ho\u1eb7c \u0111i\u1ec3m \u0111\u1ebfn c\u1ee7a d\u1eef li\u1ec7u. C\u00e1c kho d\u1eef li\u1ec7u (c\u00e1c \u0111\u01b0\u1eddng song song):V\u1eabn ti\u1ebfp t\u1ee5c bi\u1ec3u di\u1ec5n c\u00e1c kho l\u01b0u tr\u1eef d\u1eef li\u1ec7u. C\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):Hi\u1ec7n th\u1ecb c\u00e1c \u0111\u01b0\u1eddng \u0111i chi ti\u1ebft c\u1ee7a lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. T\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u: X\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i:B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a ch\u00fang v\u1edbi h\u1ec7 th\u1ed1ng. X\u00e1c \u0111\u1ecbnh c\u00e1c qu\u00e1 tr\u00ecnh:X\u00e1c \u0111\u1ecbnh v\u00e0 \u0111\u1ecbnh ngh\u0129a c\u00e1c qu\u00e1 tr\u00ecnh ch\u00ednh trong h\u1ec7 th\u1ed1ng. \u0110\u1ed1i v\u1edbi s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh, \u0111\u00e2y l\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh c\u1ea5p cao, v\u00e0 \u0111\u1ed1i v\u1edbi c\u1ea5p \u0111\u1ed9 1 v\u00e0 th\u1ea5p h\u01a1n, ch\u00fang tr\u1edf n\u00ean chi ti\u1ebft h\u01a1n. X\u00e1c \u0111\u1ecbnh c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u:Thi\u1ebft l\u1eadp c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. X\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o cho m\u1ed7i qu\u00e1 tr\u00ecnh v\u00e0 d\u1eef li\u1ec7u \u0111\u1ea7u ra. X\u00e1c \u0111\u1ecbnh c\u00e1c kho d\u1eef li\u1ec7u:Nh\u1eadn di\u1ec7n c\u00e1c kho d\u1eef li\u1ec7u n\u01a1i th\u00f4ng tin \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 truy xu\u1ea5t. V\u1ebd s\u01a1 \u0111\u1ed3:S\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u ph\u00f9 h\u1ee3p \u0111\u1ec3 t\u1ea1o s\u01a1 \u0111\u1ed3. C\u00e1c s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh t\u1eadp trung v\u00e0o c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ea5p cao, s\u01a1 \u0111\u1ed3 c\u1ea5p \u0111\u1ed9 1 cung c\u1ea5p chi ti\u1ebft h\u01a1n, v\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 c\u1ea5p th\u1ea5p h\u01a1n chia nh\u1ecf c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh chi ti\u1ebft tinh vi h\u01a1n. C\u1ea5p \u0111\u1ed9 h\u00f3a:N\u1ebfu c\u1ea7n, \u00e1p d\u1ee5ng c\u1ea5p \u0111\u1ed9 h\u00f3a \u0111\u1ec3 qu\u1ea3n l\u00fd \u0111\u1ed9 ph\u1ee9c t\u1ea1p. Chia nh\u1ecf c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con v\u00e0 t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 DFD c\u1ea5p th\u1ea5p h\u01a1n. C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9: \u0110\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng:H\u1ec7 th\u1ed1ng c\u00e0ng ph\u1ee9c t\u1ea1p, s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 c\u1ea7n thi\u1ebft \u0111\u1ec3 ghi nh\u1eadn \u0111\u1ea7y \u0111\u1ee7 chi ti\u1ebft c\u00e0ng nhi\u1ec1u. Y\u00eau c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n:M\u1ee9c \u0111\u1ed9 chi ti\u1ebft m\u00e0 c\u00e1c b\u00ean li\u00ean quan v\u00e0 y\u00eau c\u1ea7u d\u1ef1 \u00e1n y\u00eau c\u1ea7u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t. N\u1ebfu c\u00e1c b\u00ean li\u00ean quan c\u1ea7n hi\u1ec3u r\u00f5 chi ti\u1ebft v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh, c\u00f3 th\u1ec3 c\u1ea7n th\u00eam nhi\u1ec1u c\u1ea5p \u0111\u1ed9 h\u01a1n. Ph\u1ea1m vi d\u1ef1 \u00e1n:Ph\u1ea1m vi d\u1ef1 \u00e1n c\u0169ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9. C\u00e1c d\u1ef1 \u00e1n quy m\u00f4 l\u1edbn ho\u1eb7c c\u00e1c h\u1ec7 th\u1ed1ng c\u1ea5p doanh nghi\u1ec7p c\u00f3 th\u1ec3 c\u1ea7n nhi\u1ec1u c\u1ea5p \u0111\u1ed9 h\u01a1n \u0111\u1ec3 ghi nh\u1eadn m\u1ecdi chi ti\u1ebft ph\u1ee9c t\u1ea1p. C\u00e2n b\u1eb1ng gi\u1eefa s\u1ef1 r\u00f5 r\u00e0ng v\u00e0 chi ti\u1ebft:C\u00f3 m\u1ed9t s\u1ef1 c\u00e2n b\u1eb1ng tinh t\u1ebf gi\u1eefa vi\u1ec7c cung c\u1ea5p \u0111\u1ee7 chi ti\u1ebft cho ph\u00e2n t\u00edch v\u00e0 tr\u00e1nh s\u1ef1 ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft. S\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 c\u1ea7n ph\u1ea3i \u0111\u1ee7 \u0111\u1ec3 m\u00f4 t\u1ea3 ch\u00ednh x\u00e1c h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng l\u00e0m qu\u00e1 t\u1ea3i c\u00e1c b\u00ean li\u00ean quan. M\u1eb9o: T\u00ednh nh\u1ea5t qu\u00e1n:Duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n trong c\u00e1c bi\u1ec3u t\u01b0\u1ee3ng v\u00e0 k\u00fd hi\u1ec7u xuy\u00ean su\u1ed1t c\u00e1c s\u01a1 \u0111\u1ed3. S\u1ef1 r\u00f5 r\u00e0ng:\u0110\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c s\u01a1 \u0111\u1ed3 r\u00f5 r\u00e0ng v\u00e0 d\u1ec5<a href=\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/\" rel=\"bookmark\"><span class=\"screen-reader-text\">\u0110i\u1ec1u h\u01b0\u1edbng \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng: X\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ea5p \u0111\u1ed9 c\u1ee7a s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","_eb_attr":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[23],"tags":[],"class_list":["post-6379","post","type-post","status-publish","format-standard","hentry","category-dfd"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u0110i\u1ec1u h\u01b0\u1edbng \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng: X\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ea5p \u0111\u1ed9 c\u1ee7a s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u - Visual Paradigm Guides Vietnamese<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0110i\u1ec1u h\u01b0\u1edbng \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng: X\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ea5p \u0111\u1ed9 c\u1ee7a s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u - Visual Paradigm Guides Vietnamese\" \/>\n<meta property=\"og:description\" content=\"Gi\u1edbi thi\u1ec7u Trong l\u0129nh v\u1ef1c ph\u00e2n t\u00edch v\u00e0 m\u00f4 h\u00ecnh h\u00f3a h\u1ec7 th\u1ed1ng,S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFDs) \u0111\u00f3ng vai tr\u00f2 l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 l\u00e0m r\u00f5 nh\u1eefng chi ti\u1ebft ph\u1ee9c t\u1ea1p v\u1ec1 lu\u1ed3ng th\u00f4ng tin v\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh b\u00ean trong m\u1ed9t h\u1ec7 th\u1ed1ng. Tuy nhi\u00ean, th\u00e1ch th\u1ee9c n\u1eb1m \u1edf vi\u1ec7c t\u00ecm \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng ph\u00f9 h\u1ee3p gi\u1eefa vi\u1ec7c cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan c\u1ea5p cao v\u00e0 \u0111i s\u00e2u v\u00e0o chi ti\u1ebft c\u1ee5 th\u1ec3. Cu\u1ed9c th\u1ea3o lu\u1eadn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 trong DFD, \u0111\u01b0a ra nh\u1eefng hi\u1ec3u bi\u1ebft v\u1ec1 vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh qu\u00e1 tr\u00ecnh v\u1ebd s\u01a1 \u0111\u1ed3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u ri\u00eang bi\u1ec7t c\u1ee7a t\u1eebng d\u1ef1 \u00e1n. Ph\u00e2n r\u00e3 h\u1ec7 th\u1ed1ng b\u1eb1ng DFD 1. S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh: T\u1ed5ng quan:S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh cung c\u1ea5p c\u00e1i nh\u00ecn c\u1ea5p cao v\u1ec1 to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i l\u00e0 ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u, \u0111\u1ea1i di\u1ec7n cho c\u00e1c h\u1ec7 th\u1ed1ng, con ng\u01b0\u1eddi ho\u1eb7c t\u1ed5 ch\u1ee9c n\u1eb1m ngo\u00e0i h\u1ec7 th\u1ed1ng. C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng: Qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):\u0110\u1ea1i di\u1ec7n cho c\u00e1c qu\u00e1 tr\u00ecnh trong h\u1ec7 th\u1ed1ng. Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):\u0110\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u. Lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):\u0110\u1ea1i di\u1ec7n cho lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh v\u00e0 c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. 2. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p 1: T\u1ed5ng quan:S\u01a1 \u0111\u1ed3 DFD c\u1ea5p 1 cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft h\u01a1n so v\u1edbi s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh. Ch\u00fang chia nh\u1ecf h\u1ec7 th\u1ed1ng th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh v\u00e0 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c kho d\u1eef li\u1ec7u ch\u00ednh. C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng: Qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):\u0110\u1ea1i di\u1ec7n cho c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh b\u00ean trong h\u1ec7 th\u1ed1ng. Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):V\u1eabn \u0111\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u. Kho d\u1eef li\u1ec7u (c\u00e1c \u0111\u01b0\u1eddng song song):\u0110\u1ea1i di\u1ec7n cho c\u00e1c kho l\u01b0u tr\u1eef n\u01a1i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef. Lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):Hi\u1ec3n th\u1ecb lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 kho d\u1eef li\u1ec7u. 3. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p 2 (v\u00e0 th\u1ea5p h\u01a1n): T\u1ed5ng quan:Th\u00f4ng qua m\u1ed9t k\u1ef9 thu\u1eadt g\u1ecdi l\u00e0 \u201cc\u1ea5p \u0111\u1ed9 h\u00f3a,\u201d s\u1ef1 ph\u1ee9c t\u1ea1p chi ti\u1ebft c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd b\u1eb1ng c\u00e1ch t\u1ea1o ra m\u1ed9t c\u1ea5p \u0111\u1ed9 c\u00e1c tr\u1eebu t\u01b0\u1ee3ng. C\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p \u0111\u1ed9 2 v\u00e0 c\u00e1c c\u1ea5p \u0111\u1ed9 th\u1ea5p h\u01a1n cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft h\u01a1n v\u1ec1 h\u1ec7 th\u1ed1ng, ph\u00e2n chia c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con v\u00e0 chi ti\u1ebft h\u00f3a th\u00eam v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng: C\u00e1c qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):Ph\u00e2n chia th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con chi ti\u1ebft h\u01a1n. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):Gi\u1eef vai tr\u00f2 l\u00e0 ngu\u1ed3n ho\u1eb7c \u0111i\u1ec3m \u0111\u1ebfn c\u1ee7a d\u1eef li\u1ec7u. C\u00e1c kho d\u1eef li\u1ec7u (c\u00e1c \u0111\u01b0\u1eddng song song):V\u1eabn ti\u1ebfp t\u1ee5c bi\u1ec3u di\u1ec5n c\u00e1c kho l\u01b0u tr\u1eef d\u1eef li\u1ec7u. C\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):Hi\u1ec7n th\u1ecb c\u00e1c \u0111\u01b0\u1eddng \u0111i chi ti\u1ebft c\u1ee7a lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. T\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u: X\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i:B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a ch\u00fang v\u1edbi h\u1ec7 th\u1ed1ng. X\u00e1c \u0111\u1ecbnh c\u00e1c qu\u00e1 tr\u00ecnh:X\u00e1c \u0111\u1ecbnh v\u00e0 \u0111\u1ecbnh ngh\u0129a c\u00e1c qu\u00e1 tr\u00ecnh ch\u00ednh trong h\u1ec7 th\u1ed1ng. \u0110\u1ed1i v\u1edbi s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh, \u0111\u00e2y l\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh c\u1ea5p cao, v\u00e0 \u0111\u1ed1i v\u1edbi c\u1ea5p \u0111\u1ed9 1 v\u00e0 th\u1ea5p h\u01a1n, ch\u00fang tr\u1edf n\u00ean chi ti\u1ebft h\u01a1n. X\u00e1c \u0111\u1ecbnh c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u:Thi\u1ebft l\u1eadp c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. X\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o cho m\u1ed7i qu\u00e1 tr\u00ecnh v\u00e0 d\u1eef li\u1ec7u \u0111\u1ea7u ra. X\u00e1c \u0111\u1ecbnh c\u00e1c kho d\u1eef li\u1ec7u:Nh\u1eadn di\u1ec7n c\u00e1c kho d\u1eef li\u1ec7u n\u01a1i th\u00f4ng tin \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 truy xu\u1ea5t. V\u1ebd s\u01a1 \u0111\u1ed3:S\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u ph\u00f9 h\u1ee3p \u0111\u1ec3 t\u1ea1o s\u01a1 \u0111\u1ed3. C\u00e1c s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh t\u1eadp trung v\u00e0o c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ea5p cao, s\u01a1 \u0111\u1ed3 c\u1ea5p \u0111\u1ed9 1 cung c\u1ea5p chi ti\u1ebft h\u01a1n, v\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 c\u1ea5p th\u1ea5p h\u01a1n chia nh\u1ecf c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh chi ti\u1ebft tinh vi h\u01a1n. C\u1ea5p \u0111\u1ed9 h\u00f3a:N\u1ebfu c\u1ea7n, \u00e1p d\u1ee5ng c\u1ea5p \u0111\u1ed9 h\u00f3a \u0111\u1ec3 qu\u1ea3n l\u00fd \u0111\u1ed9 ph\u1ee9c t\u1ea1p. Chia nh\u1ecf c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con v\u00e0 t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 DFD c\u1ea5p th\u1ea5p h\u01a1n. C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9: \u0110\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng:H\u1ec7 th\u1ed1ng c\u00e0ng ph\u1ee9c t\u1ea1p, s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 c\u1ea7n thi\u1ebft \u0111\u1ec3 ghi nh\u1eadn \u0111\u1ea7y \u0111\u1ee7 chi ti\u1ebft c\u00e0ng nhi\u1ec1u. Y\u00eau c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n:M\u1ee9c \u0111\u1ed9 chi ti\u1ebft m\u00e0 c\u00e1c b\u00ean li\u00ean quan v\u00e0 y\u00eau c\u1ea7u d\u1ef1 \u00e1n y\u00eau c\u1ea7u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t. N\u1ebfu c\u00e1c b\u00ean li\u00ean quan c\u1ea7n hi\u1ec3u r\u00f5 chi ti\u1ebft v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh, c\u00f3 th\u1ec3 c\u1ea7n th\u00eam nhi\u1ec1u c\u1ea5p \u0111\u1ed9 h\u01a1n. Ph\u1ea1m vi d\u1ef1 \u00e1n:Ph\u1ea1m vi d\u1ef1 \u00e1n c\u0169ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9. C\u00e1c d\u1ef1 \u00e1n quy m\u00f4 l\u1edbn ho\u1eb7c c\u00e1c h\u1ec7 th\u1ed1ng c\u1ea5p doanh nghi\u1ec7p c\u00f3 th\u1ec3 c\u1ea7n nhi\u1ec1u c\u1ea5p \u0111\u1ed9 h\u01a1n \u0111\u1ec3 ghi nh\u1eadn m\u1ecdi chi ti\u1ebft ph\u1ee9c t\u1ea1p. C\u00e2n b\u1eb1ng gi\u1eefa s\u1ef1 r\u00f5 r\u00e0ng v\u00e0 chi ti\u1ebft:C\u00f3 m\u1ed9t s\u1ef1 c\u00e2n b\u1eb1ng tinh t\u1ebf gi\u1eefa vi\u1ec7c cung c\u1ea5p \u0111\u1ee7 chi ti\u1ebft cho ph\u00e2n t\u00edch v\u00e0 tr\u00e1nh s\u1ef1 ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft. S\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 c\u1ea7n ph\u1ea3i \u0111\u1ee7 \u0111\u1ec3 m\u00f4 t\u1ea3 ch\u00ednh x\u00e1c h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng l\u00e0m qu\u00e1 t\u1ea3i c\u00e1c b\u00ean li\u00ean quan. M\u1eb9o: T\u00ednh nh\u1ea5t qu\u00e1n:Duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n trong c\u00e1c bi\u1ec3u t\u01b0\u1ee3ng v\u00e0 k\u00fd hi\u1ec7u xuy\u00ean su\u1ed1t c\u00e1c s\u01a1 \u0111\u1ed3. 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Tuy nhi\u00ean, th\u00e1ch th\u1ee9c n\u1eb1m \u1edf vi\u1ec7c t\u00ecm \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng ph\u00f9 h\u1ee3p gi\u1eefa vi\u1ec7c cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan c\u1ea5p cao v\u00e0 \u0111i s\u00e2u v\u00e0o chi ti\u1ebft c\u1ee5 th\u1ec3. Cu\u1ed9c th\u1ea3o lu\u1eadn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 trong DFD, \u0111\u01b0a ra nh\u1eefng hi\u1ec3u bi\u1ebft v\u1ec1 vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh qu\u00e1 tr\u00ecnh v\u1ebd s\u01a1 \u0111\u1ed3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u ri\u00eang bi\u1ec7t c\u1ee7a t\u1eebng d\u1ef1 \u00e1n. Ph\u00e2n r\u00e3 h\u1ec7 th\u1ed1ng b\u1eb1ng DFD 1. S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh: T\u1ed5ng quan:S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh cung c\u1ea5p c\u00e1i nh\u00ecn c\u1ea5p cao v\u1ec1 to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i l\u00e0 ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u, \u0111\u1ea1i di\u1ec7n cho c\u00e1c h\u1ec7 th\u1ed1ng, con ng\u01b0\u1eddi ho\u1eb7c t\u1ed5 ch\u1ee9c n\u1eb1m ngo\u00e0i h\u1ec7 th\u1ed1ng. C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng: Qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):\u0110\u1ea1i di\u1ec7n cho c\u00e1c qu\u00e1 tr\u00ecnh trong h\u1ec7 th\u1ed1ng. Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):\u0110\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u. Lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):\u0110\u1ea1i di\u1ec7n cho lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh v\u00e0 c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. 2. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p 1: T\u1ed5ng quan:S\u01a1 \u0111\u1ed3 DFD c\u1ea5p 1 cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft h\u01a1n so v\u1edbi s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh. Ch\u00fang chia nh\u1ecf h\u1ec7 th\u1ed1ng th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh v\u00e0 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c kho d\u1eef li\u1ec7u ch\u00ednh. C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng: Qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):\u0110\u1ea1i di\u1ec7n cho c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh b\u00ean trong h\u1ec7 th\u1ed1ng. Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):V\u1eabn \u0111\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u. Kho d\u1eef li\u1ec7u (c\u00e1c \u0111\u01b0\u1eddng song song):\u0110\u1ea1i di\u1ec7n cho c\u00e1c kho l\u01b0u tr\u1eef n\u01a1i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef. Lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):Hi\u1ec3n th\u1ecb lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 kho d\u1eef li\u1ec7u. 3. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p 2 (v\u00e0 th\u1ea5p h\u01a1n): T\u1ed5ng quan:Th\u00f4ng qua m\u1ed9t k\u1ef9 thu\u1eadt g\u1ecdi l\u00e0 \u201cc\u1ea5p \u0111\u1ed9 h\u00f3a,\u201d s\u1ef1 ph\u1ee9c t\u1ea1p chi ti\u1ebft c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd b\u1eb1ng c\u00e1ch t\u1ea1o ra m\u1ed9t c\u1ea5p \u0111\u1ed9 c\u00e1c tr\u1eebu t\u01b0\u1ee3ng. C\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea5p \u0111\u1ed9 2 v\u00e0 c\u00e1c c\u1ea5p \u0111\u1ed9 th\u1ea5p h\u01a1n cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft h\u01a1n v\u1ec1 h\u1ec7 th\u1ed1ng, ph\u00e2n chia c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con v\u00e0 chi ti\u1ebft h\u00f3a th\u00eam v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. C\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng: C\u00e1c qu\u00e1 tr\u00ecnh (h\u00ecnh ch\u1eef nh\u1eadt tr\u00f2n):Ph\u00e2n chia th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con chi ti\u1ebft h\u01a1n. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (h\u00ecnh vu\u00f4ng):Gi\u1eef vai tr\u00f2 l\u00e0 ngu\u1ed3n ho\u1eb7c \u0111i\u1ec3m \u0111\u1ebfn c\u1ee7a d\u1eef li\u1ec7u. C\u00e1c kho d\u1eef li\u1ec7u (c\u00e1c \u0111\u01b0\u1eddng song song):V\u1eabn ti\u1ebfp t\u1ee5c bi\u1ec3u di\u1ec5n c\u00e1c kho l\u01b0u tr\u1eef d\u1eef li\u1ec7u. C\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u (m\u0169i t\u00ean):Hi\u1ec7n th\u1ecb c\u00e1c \u0111\u01b0\u1eddng \u0111i chi ti\u1ebft c\u1ee7a lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. T\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u: X\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i:B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a ch\u00fang v\u1edbi h\u1ec7 th\u1ed1ng. X\u00e1c \u0111\u1ecbnh c\u00e1c qu\u00e1 tr\u00ecnh:X\u00e1c \u0111\u1ecbnh v\u00e0 \u0111\u1ecbnh ngh\u0129a c\u00e1c qu\u00e1 tr\u00ecnh ch\u00ednh trong h\u1ec7 th\u1ed1ng. \u0110\u1ed1i v\u1edbi s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh, \u0111\u00e2y l\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh c\u1ea5p cao, v\u00e0 \u0111\u1ed1i v\u1edbi c\u1ea5p \u0111\u1ed9 1 v\u00e0 th\u1ea5p h\u01a1n, ch\u00fang tr\u1edf n\u00ean chi ti\u1ebft h\u01a1n. X\u00e1c \u0111\u1ecbnh c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u:Thi\u1ebft l\u1eadp c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh, c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c kho d\u1eef li\u1ec7u. X\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o cho m\u1ed7i qu\u00e1 tr\u00ecnh v\u00e0 d\u1eef li\u1ec7u \u0111\u1ea7u ra. X\u00e1c \u0111\u1ecbnh c\u00e1c kho d\u1eef li\u1ec7u:Nh\u1eadn di\u1ec7n c\u00e1c kho d\u1eef li\u1ec7u n\u01a1i th\u00f4ng tin \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 truy xu\u1ea5t. V\u1ebd s\u01a1 \u0111\u1ed3:S\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u ph\u00f9 h\u1ee3p \u0111\u1ec3 t\u1ea1o s\u01a1 \u0111\u1ed3. C\u00e1c s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh t\u1eadp trung v\u00e0o c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ea5p cao, s\u01a1 \u0111\u1ed3 c\u1ea5p \u0111\u1ed9 1 cung c\u1ea5p chi ti\u1ebft h\u01a1n, v\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 c\u1ea5p th\u1ea5p h\u01a1n chia nh\u1ecf c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh chi ti\u1ebft tinh vi h\u01a1n. C\u1ea5p \u0111\u1ed9 h\u00f3a:N\u1ebfu c\u1ea7n, \u00e1p d\u1ee5ng c\u1ea5p \u0111\u1ed9 h\u00f3a \u0111\u1ec3 qu\u1ea3n l\u00fd \u0111\u1ed9 ph\u1ee9c t\u1ea1p. Chia nh\u1ecf c\u00e1c qu\u00e1 tr\u00ecnh th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con v\u00e0 t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 DFD c\u1ea5p th\u1ea5p h\u01a1n. C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9: \u0110\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng:H\u1ec7 th\u1ed1ng c\u00e0ng ph\u1ee9c t\u1ea1p, s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 c\u1ea7n thi\u1ebft \u0111\u1ec3 ghi nh\u1eadn \u0111\u1ea7y \u0111\u1ee7 chi ti\u1ebft c\u00e0ng nhi\u1ec1u. Y\u00eau c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n:M\u1ee9c \u0111\u1ed9 chi ti\u1ebft m\u00e0 c\u00e1c b\u00ean li\u00ean quan v\u00e0 y\u00eau c\u1ea7u d\u1ef1 \u00e1n y\u00eau c\u1ea7u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t. N\u1ebfu c\u00e1c b\u00ean li\u00ean quan c\u1ea7n hi\u1ec3u r\u00f5 chi ti\u1ebft v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh, c\u00f3 th\u1ec3 c\u1ea7n th\u00eam nhi\u1ec1u c\u1ea5p \u0111\u1ed9 h\u01a1n. Ph\u1ea1m vi d\u1ef1 \u00e1n:Ph\u1ea1m vi d\u1ef1 \u00e1n c\u0169ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9. C\u00e1c d\u1ef1 \u00e1n quy m\u00f4 l\u1edbn ho\u1eb7c c\u00e1c h\u1ec7 th\u1ed1ng c\u1ea5p doanh nghi\u1ec7p c\u00f3 th\u1ec3 c\u1ea7n nhi\u1ec1u c\u1ea5p \u0111\u1ed9 h\u01a1n \u0111\u1ec3 ghi nh\u1eadn m\u1ecdi chi ti\u1ebft ph\u1ee9c t\u1ea1p. C\u00e2n b\u1eb1ng gi\u1eefa s\u1ef1 r\u00f5 r\u00e0ng v\u00e0 chi ti\u1ebft:C\u00f3 m\u1ed9t s\u1ef1 c\u00e2n b\u1eb1ng tinh t\u1ebf gi\u1eefa vi\u1ec7c cung c\u1ea5p \u0111\u1ee7 chi ti\u1ebft cho ph\u00e2n t\u00edch v\u00e0 tr\u00e1nh s\u1ef1 ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft. S\u1ed1 l\u01b0\u1ee3ng c\u1ea5p \u0111\u1ed9 c\u1ea7n ph\u1ea3i \u0111\u1ee7 \u0111\u1ec3 m\u00f4 t\u1ea3 ch\u00ednh x\u00e1c h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng l\u00e0m qu\u00e1 t\u1ea3i c\u00e1c b\u00ean li\u00ean quan. M\u1eb9o: T\u00ednh nh\u1ea5t qu\u00e1n:Duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n trong c\u00e1c bi\u1ec3u t\u01b0\u1ee3ng v\u00e0 k\u00fd hi\u1ec7u xuy\u00ean su\u1ed1t c\u00e1c s\u01a1 \u0111\u1ed3. S\u1ef1 r\u00f5 r\u00e0ng:\u0110\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c s\u01a1 \u0111\u1ed3 r\u00f5 r\u00e0ng v\u00e0 d\u1ec5\u0110i\u1ec1u h\u01b0\u1edbng \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng: X\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ea5p \u0111\u1ed9 c\u1ee7a s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u","og_url":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/","og_site_name":"Visual Paradigm Guides Vietnamese","article_published_time":"2026-02-04T09:41:50+00:00","og_image":[{"width":871,"height":327,"url":"https:\/\/guides.visual-paradigm.com\/vn\/wp-content\/uploads\/sites\/10\/2023\/10\/img_6525fa765caea.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"vpadmin","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"5 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/#article","isPartOf":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/"},"headline":"\u0110i\u1ec1u h\u01b0\u1edbng \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng: X\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ea5p \u0111\u1ed9 c\u1ee7a s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u","datePublished":"2026-02-04T09:41:50+00:00","mainEntityOfPage":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/"},"wordCount":2682,"commentCount":0,"image":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/#primaryimage"},"thumbnailUrl":"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/10\/img_6525fa765caea.png","articleSection":["DFD"],"inLanguage":"vi","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/","url":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-system-complexity-determining-the-levels-of-data-flow-diagrams\/","name":"\u0110i\u1ec1u h\u01b0\u1edbng \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng: X\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ea5p \u0111\u1ed9 c\u1ee7a s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u - 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