{"id":6373,"date":"2026-02-04T17:20:17","date_gmt":"2026-02-04T09:20:17","guid":{"rendered":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/"},"modified":"2026-02-04T17:20:17","modified_gmt":"2026-02-04T09:20:17","slug":"understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them","status":"publish","type":"post","link":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/","title":{"rendered":"Hi\u1ec3u v\u1ec1 DFD logic so v\u1edbi DFD v\u1eadt l\u00fd: Khi n\u00e0o v\u00e0 t\u1ea1i sao ch\u00fang ta c\u1ea7n ch\u00fang"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u<\/h2>\n<p><a href=\"https:\/\/www.visual-paradigm.com\/tutorials\/how-to-create-data-flow-diagram\/\">S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u<\/a> (DFDs) l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u0111\u1ec3 tr\u1ef1c quan h\u00f3a lu\u1ed3ng d\u1eef li\u1ec7u b\u00ean trong m\u1ed9t h\u1ec7 th\u1ed1ng. Ch\u00fang gi\u00fap hi\u1ec3u v\u00e0 ghi ch\u00e9p c\u00e1c quy tr\u00ecnh, kho d\u1eef li\u1ec7u v\u00e0 s\u1ef1 di chuy\u1ec3n d\u1eef li\u1ec7u trong m\u1ed9t h\u1ec7 th\u1ed1ng. Hai lo\u1ea1i DFD ch\u00ednh, DFD logic v\u00e0 DFD v\u1eadt l\u00fd, ph\u1ee5c v\u1ee5 nh\u1eefng m\u1ee5c \u0111\u00edch ri\u00eang bi\u1ec7t trong v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n, m\u1ed7i lo\u1ea1i \u0111\u1ec1u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong thi\u1ebft k\u1ebf v\u00e0 tri\u1ec3n khai m\u1ed9t h\u1ec7 th\u1ed1ng.<\/p>\n<h2>DFD logic<\/h2>\n<p>DFD logic t\u1eadp trung v\u00e0o c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 quy tr\u00ecnh logic b\u00ean trong h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng \u0111i s\u00e2u v\u00e0o chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p m\u1ed9t tr\u1eebu t\u01b0\u1ee3ng c\u1ea5p cao, nh\u1ea5n m\u1ea1nh v\u00e0o c\u00e1c ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i v\u00e0 t\u01b0\u01a1ng t\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng. DFD logic ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng, khi tr\u1ecdng t\u00e2m l\u00e0 hi\u1ec3u ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng t\u1eeb g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<h2>Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng DFD logic<\/h2>\n<ol>\n<li><strong>Ph\u00e2n t\u00edch y\u00eau c\u1ea7u:<\/strong> DFD logic \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong giai \u0111o\u1ea1n ph\u00e2n t\u00edch y\u00eau c\u1ea7u. Ch\u00fang gi\u00fap c\u00e1c nh\u00e0 ph\u00e2n t\u00edch v\u00e0 b\u00ean li\u00ean quan hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c quy tr\u00ecnh v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ed1t l\u00f5i m\u00e0 kh\u00f4ng b\u1ecb sa \u0111\u00e0 v\u00e0o c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt ph\u1ee9c t\u1ea1p.<\/li>\n<li><strong>Giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi d\u00f9ng:<\/strong> Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 giao ti\u1ebfp qu\u00fd gi\u00e1 gi\u1eefa c\u00e1c nh\u00e0 ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng v\u00e0 ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i. Ch\u00fang t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 y\u00eau c\u1ea7u v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng b\u1eb1ng ng\u00f4n ng\u1eef d\u1ec5 hi\u1ec3u \u0111\u1ed1i v\u1edbi c\u00e1c b\u00ean li\u00ean quan kh\u00f4ng chuy\u00ean v\u1ec1 k\u1ef9 thu\u1eadt.<\/li>\n<li><strong>Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u1ea5p cao:<\/strong> DFD logic h\u1ed7 tr\u1ee3 t\u1ea1o ra b\u1ea3n v\u1ebd t\u1ed5ng quan c\u1ea5p cao cho thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. Ch\u00fang l\u00e0m n\u1ed5i b\u1eadt c\u00e1c quy tr\u00ecnh ch\u00ednh v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u, \u0111\u1eb7t n\u1ec1n t\u1ea3ng cho c\u00e1c giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n ti\u1ebfp theo.<\/li>\n<\/ol>\n<h2>T\u1ea1i sao c\u1ea7n DFD logic<\/h2>\n<ul>\n<li><strong>Tr\u1eebu t\u01b0\u1ee3ng:<\/strong> DFD logic lo\u1ea1i b\u1ecf c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt, cung c\u1ea5p m\u1ed9t bi\u1ec3u di\u1ec5n r\u00f5 r\u00e0ng v\u00e0 s\u00fac t\u00edch v\u1ec1 ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng. \u0110i\u1ec1u n\u00e0y gi\u00fap tr\u00e1nh nh\u1eefng ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft trong c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn ban \u0111\u1ea7u.<\/li>\n<li><strong>T\u1eadp trung v\u00e0o ng\u01b0\u1eddi d\u00f9ng:<\/strong> B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng, DFD logic \u0111\u1ea3m b\u1ea3o r\u1eb1ng thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u v\u00e0 k\u1ef3 v\u1ecdng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<\/ul>\n<h2>DFD v\u1eadt l\u00fd<\/h2>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, DFD v\u1eadt l\u00fd \u0111i s\u00e2u v\u00e0o c\u00e1c kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt c\u1ee7a vi\u1ec7c tri\u1ec3n khai h\u1ec7 th\u1ed1ng. Ch\u00fang chi ti\u1ebft h\u00f3a c\u00e1ch c\u00e1c th\u00e0nh ph\u1ea7n logic \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong DFD logic \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m, c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n m\u1ea1ng.<\/p>\n<h2>Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng DFD v\u1eadt l\u00fd<\/h2>\n<ol>\n<li><strong>Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft:<\/strong> DFD v\u1eadt l\u00fd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft. Ch\u00fang cung c\u1ea5p b\u1ea3n \u0111\u1ed3 h\u00e0nh tr\u00ecnh cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, x\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c quy tr\u00ecnh logic s\u1ebd \u0111\u01b0\u1ee3c tri\u1ec3n khai b\u1eb1ng c\u00e1c c\u00f4ng ngh\u1ec7 v\u00e0 ngu\u1ed3n l\u1ef1c c\u1ee5 th\u1ec3.<\/li>\n<li><strong>Giai \u0111o\u1ea1n tri\u1ec3n khai:<\/strong> Khi h\u1ec7 th\u1ed1ng ti\u1ebfn t\u1edbi giai \u0111o\u1ea1n tri\u1ec3n khai, DFD v\u1eadt l\u00fd h\u01b0\u1edbng d\u1eabn c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n chuy\u1ec3n \u0111\u1ed5i thi\u1ebft k\u1ebf logic th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng c\u1ee5 th\u1ec3 b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c th\u00e0nh ph\u1ea7n ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m tham gia.<\/li>\n<li><strong>T\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t:<\/strong> DFD v\u1eadt l\u00fd l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng. Ch\u00fang gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn ti\u1ec1m t\u00e0ng v\u00e0 c\u00e1c khu v\u1ef1c c\u1ea7n c\u1ea3i thi\u1ec7n v\u1ec1 m\u1eb7t s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean.<\/li>\n<\/ol>\n<h2>T\u1ea1i sao c\u1ea7n DFD v\u1eadt l\u00fd<\/h2>\n<ul>\n<li><strong>H\u01b0\u1edbng d\u1eabn tri\u1ec3n khai:<\/strong> DFD v\u1eadt l\u00fd cung c\u1ea5p h\u01b0\u1edbng d\u1eabn chi ti\u1ebft cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, n\u00eau r\u00f5 c\u00e1c b\u01b0\u1edbc v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec7n th\u1ef1c h\u00f3a thi\u1ebft k\u1ebf logic.<\/li>\n<li><strong>Hi\u1ec7u qu\u1ea3 v\u00e0 T\u1ed1i \u01b0u h\u00f3a:<\/strong>B\u1eb1ng c\u00e1ch \u0111i s\u00e2u v\u00e0o c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt, c\u00e1c s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd cho ph\u00e9p t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng v\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean.<\/li>\n<\/ul>\n<h2>S\u01a1 \u0111\u1ed3 DFD logic so v\u1edbi s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd: T\u00f3m t\u1eaft<\/h2>\n<table>\n<thead>\n<tr>\n<th>Kh\u00eda c\u1ea1nh<\/th>\n<th>S\u01a1 \u0111\u1ed3 DFD logic<\/th>\n<th>S\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Tr\u1ecdng t\u00e2m<\/strong><\/td>\n<td>Tr\u1eebu t\u01b0\u1ee3ng c\u1ea5p cao v\u1ec1 quy tr\u00ecnh v\u00e0 d\u1eef li\u1ec7u<\/td>\n<td>Chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt chi ti\u1ebft<\/td>\n<\/tr>\n<tr>\n<td><strong>M\u1ee5c \u0111\u00edch<\/strong><\/td>\n<td>Ph\u00e2n t\u00edch y\u00eau c\u1ea7u, giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi d\u00f9ng<\/td>\n<td>Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft, tri\u1ec3n khai<\/td>\n<\/tr>\n<tr>\n<td><strong>M\u1ee9c \u0111\u1ed9 bi\u1ec3u di\u1ec5n<\/strong><\/td>\n<td>Kh\u00e1i ni\u1ec7m<\/td>\n<td>K\u1ef9 thu\u1eadt<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110\u1ed1i t\u01b0\u1ee3ng m\u1ee5c ti\u00eau<\/strong><\/td>\n<td>C\u00e1c b\u00ean li\u00ean quan, ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i<\/td>\n<td>L\u1eadp tr\u00ecnh vi\u00ean, ki\u1ebfn tr\u00fac s\u01b0 h\u1ec7 th\u1ed1ng<\/td>\n<\/tr>\n<tr>\n<td><strong>Ph\u1ea1m vi<\/strong><\/td>\n<td>Ch\u1ee9c n\u0103ng h\u1ec7 th\u1ed1ng t\u1eeb g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng<\/td>\n<td>Chi ti\u1ebft k\u1ef9 thu\u1eadt v\u1ec1 tri\u1ec3n khai h\u1ec7 th\u1ed1ng<\/td>\n<\/tr>\n<tr>\n<td><strong>Tr\u1eebu t\u01b0\u1ee3ng<\/strong><\/td>\n<td>Nh\u1ea5n m\u1ea1nh c\u00e1c ch\u1ee9c n\u0103ng v\u00e0 t\u01b0\u01a1ng t\u00e1c thi\u1ebft y\u1ebfu<\/td>\n<td>Chuy\u1ec3n \u0111\u1ed5i c\u00e1c th\u00e0nh ph\u1ea7n logic th\u00e0nh c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3<\/td>\n<\/tr>\n<tr>\n<td><strong>Th\u1eddi \u0111i\u1ec3m s\u1eed d\u1ee5ng<\/strong><\/td>\n<td>Giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng<\/td>\n<td>Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft v\u00e0 tri\u1ec3n khai<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n<\/strong><\/td>\n<td>Quy tr\u00ecnh, lu\u1ed3ng d\u1eef li\u1ec7u, kho d\u1eef li\u1ec7u<\/td>\n<td>Ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m, c\u01a1 s\u1edf d\u1eef li\u1ec7u, m\u1ea1ng l\u01b0\u1edbi<\/td>\n<\/tr>\n<tr>\n<td><strong>S\u1eed d\u1ee5ng trong t\u1ed1i \u01b0u h\u00f3a<\/strong><\/td>\n<td>Kh\u00f4ng t\u1eadp trung v\u00e0o t\u1ed1i \u01b0u h\u00f3a<\/td>\n<td>X\u00e1c \u0111\u1ecbnh c\u00e1c khu v\u1ef1c c\u1ea7n t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t<\/td>\n<\/tr>\n<tr>\n<td><strong>Ng\u00f4n ng\u1eef<\/strong><\/td>\n<td>D\u1ec5 s\u1eed d\u1ee5ng, kh\u00f4ng chuy\u00ean m\u00f4n<\/td>\n<td>Chuy\u00ean m\u00f4n, li\u00ean quan \u0111\u1ebfn c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ee5 th\u1ec3<\/td>\n<\/tr>\n<tr>\n<td><strong>M\u1ee9c \u0111\u1ed9 chi ti\u1ebft<\/strong><\/td>\n<td>Cao c\u1ea5p<\/td>\n<td>Chi ti\u1ebft<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p id=\"yHiZyRL\">B\u1ea3ng n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn nhanh v\u1ec1 nh\u1eefng kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa<a href=\"https:\/\/www.visual-paradigm.com\/guide\/data-flow-diagram\/logical-vs-physical-data-flow-diagrams\/\"> C\u00e1c s\u01a1 \u0111\u1ed3 DFD logic v\u00e0 s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd<\/a> v\u1ec1 m\u1eb7t t\u1eadp trung, m\u1ee5c \u0111\u00edch, \u0111\u1ed1i t\u01b0\u1ee3ng, ph\u1ea1m vi, m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh li\u00ean quan kh\u00e1c.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Trong th\u1ebf gi\u1edbi ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng, c\u1ea3 s\u01a1 \u0111\u1ed3 DFD logic v\u00e0 s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd \u0111\u1ec1u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t \u1edf c\u00e1c giai \u0111o\u1ea1n kh\u00e1c nhau trong v\u00f2ng \u0111\u1eddi. S\u01a1 \u0111\u1ed3 DFD logic cung c\u1ea5p c\u00e1i nh\u00ecn tr\u1eebu t\u01b0\u1ee3ng, l\u1ea5y ng\u01b0\u1eddi d\u00f9ng l\u00e0m trung t\u00e2m trong c\u00e1c giai \u0111o\u1ea1n \u0111\u1ea7u, \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng. M\u1eb7t kh\u00e1c, s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd cung c\u1ea5p b\u1ea3n v\u1ebd k\u1ef9 thu\u1eadt c\u1ea7n thi\u1ebft cho vi\u1ec7c tri\u1ec3n khai hi\u1ec7u qu\u1ea3, d\u1eabn d\u1eaft c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n qua nh\u1eefng chi ti\u1ebft c\u1ee5 th\u1ec3 trong qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng. C\u00f9ng nhau, hai lo\u1ea1i s\u01a1 \u0111\u1ed3 DFD n\u00e0y g\u00f3p ph\u1ea7n v\u00e0o m\u1ed9t qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng to\u00e0n di\u1ec7n v\u00e0 th\u00e0nh c\u00f4ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gi\u1edbi thi\u1ec7u S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFDs) l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u0111\u1ec3 tr\u1ef1c quan h\u00f3a lu\u1ed3ng d\u1eef li\u1ec7u b\u00ean trong m\u1ed9t h\u1ec7 th\u1ed1ng. Ch\u00fang gi\u00fap hi\u1ec3u v\u00e0 ghi ch\u00e9p c\u00e1c quy tr\u00ecnh, kho d\u1eef li\u1ec7u v\u00e0 s\u1ef1 di chuy\u1ec3n d\u1eef li\u1ec7u trong m\u1ed9t h\u1ec7 th\u1ed1ng. Hai lo\u1ea1i DFD ch\u00ednh, DFD logic v\u00e0 DFD v\u1eadt l\u00fd, ph\u1ee5c v\u1ee5 nh\u1eefng m\u1ee5c \u0111\u00edch ri\u00eang bi\u1ec7t trong v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n, m\u1ed7i lo\u1ea1i \u0111\u1ec1u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong thi\u1ebft k\u1ebf v\u00e0 tri\u1ec3n khai m\u1ed9t h\u1ec7 th\u1ed1ng. DFD logic DFD logic t\u1eadp trung v\u00e0o c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 quy tr\u00ecnh logic b\u00ean trong h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng \u0111i s\u00e2u v\u00e0o chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p m\u1ed9t tr\u1eebu t\u01b0\u1ee3ng c\u1ea5p cao, nh\u1ea5n m\u1ea1nh v\u00e0o c\u00e1c ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i v\u00e0 t\u01b0\u01a1ng t\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng. DFD logic ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng, khi tr\u1ecdng t\u00e2m l\u00e0 hi\u1ec3u ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng t\u1eeb g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng. Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng DFD logic Ph\u00e2n t\u00edch y\u00eau c\u1ea7u: DFD logic \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong giai \u0111o\u1ea1n ph\u00e2n t\u00edch y\u00eau c\u1ea7u. Ch\u00fang gi\u00fap c\u00e1c nh\u00e0 ph\u00e2n t\u00edch v\u00e0 b\u00ean li\u00ean quan hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c quy tr\u00ecnh v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ed1t l\u00f5i m\u00e0 kh\u00f4ng b\u1ecb sa \u0111\u00e0 v\u00e0o c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt ph\u1ee9c t\u1ea1p. Giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi d\u00f9ng: Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 giao ti\u1ebfp qu\u00fd gi\u00e1 gi\u1eefa c\u00e1c nh\u00e0 ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng v\u00e0 ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i. Ch\u00fang t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 y\u00eau c\u1ea7u v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng b\u1eb1ng ng\u00f4n ng\u1eef d\u1ec5 hi\u1ec3u \u0111\u1ed1i v\u1edbi c\u00e1c b\u00ean li\u00ean quan kh\u00f4ng chuy\u00ean v\u1ec1 k\u1ef9 thu\u1eadt. Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u1ea5p cao: DFD logic h\u1ed7 tr\u1ee3 t\u1ea1o ra b\u1ea3n v\u1ebd t\u1ed5ng quan c\u1ea5p cao cho thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. Ch\u00fang l\u00e0m n\u1ed5i b\u1eadt c\u00e1c quy tr\u00ecnh ch\u00ednh v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u, \u0111\u1eb7t n\u1ec1n t\u1ea3ng cho c\u00e1c giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n ti\u1ebfp theo. T\u1ea1i sao c\u1ea7n DFD logic Tr\u1eebu t\u01b0\u1ee3ng: DFD logic lo\u1ea1i b\u1ecf c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt, cung c\u1ea5p m\u1ed9t bi\u1ec3u di\u1ec5n r\u00f5 r\u00e0ng v\u00e0 s\u00fac t\u00edch v\u1ec1 ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng. \u0110i\u1ec1u n\u00e0y gi\u00fap tr\u00e1nh nh\u1eefng ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft trong c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn ban \u0111\u1ea7u. T\u1eadp trung v\u00e0o ng\u01b0\u1eddi d\u00f9ng: B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng, DFD logic \u0111\u1ea3m b\u1ea3o r\u1eb1ng thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u v\u00e0 k\u1ef3 v\u1ecdng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. DFD v\u1eadt l\u00fd Ng\u01b0\u1ee3c l\u1ea1i, DFD v\u1eadt l\u00fd \u0111i s\u00e2u v\u00e0o c\u00e1c kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt c\u1ee7a vi\u1ec7c tri\u1ec3n khai h\u1ec7 th\u1ed1ng. Ch\u00fang chi ti\u1ebft h\u00f3a c\u00e1ch c\u00e1c th\u00e0nh ph\u1ea7n logic \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong DFD logic \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m, c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n m\u1ea1ng. Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng DFD v\u1eadt l\u00fd Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft: DFD v\u1eadt l\u00fd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft. Ch\u00fang cung c\u1ea5p b\u1ea3n \u0111\u1ed3 h\u00e0nh tr\u00ecnh cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, x\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c quy tr\u00ecnh logic s\u1ebd \u0111\u01b0\u1ee3c tri\u1ec3n khai b\u1eb1ng c\u00e1c c\u00f4ng ngh\u1ec7 v\u00e0 ngu\u1ed3n l\u1ef1c c\u1ee5 th\u1ec3. Giai \u0111o\u1ea1n tri\u1ec3n khai: Khi h\u1ec7 th\u1ed1ng ti\u1ebfn t\u1edbi giai \u0111o\u1ea1n tri\u1ec3n khai, DFD v\u1eadt l\u00fd h\u01b0\u1edbng d\u1eabn c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n chuy\u1ec3n \u0111\u1ed5i thi\u1ebft k\u1ebf logic th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng c\u1ee5 th\u1ec3 b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c th\u00e0nh ph\u1ea7n ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m tham gia. T\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t: DFD v\u1eadt l\u00fd l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng. Ch\u00fang gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn ti\u1ec1m t\u00e0ng v\u00e0 c\u00e1c khu v\u1ef1c c\u1ea7n c\u1ea3i thi\u1ec7n v\u1ec1 m\u1eb7t s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean. T\u1ea1i sao c\u1ea7n DFD v\u1eadt l\u00fd H\u01b0\u1edbng d\u1eabn tri\u1ec3n khai: DFD v\u1eadt l\u00fd cung c\u1ea5p h\u01b0\u1edbng d\u1eabn chi ti\u1ebft cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, n\u00eau r\u00f5 c\u00e1c b\u01b0\u1edbc v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec7n th\u1ef1c h\u00f3a thi\u1ebft k\u1ebf logic. Hi\u1ec7u qu\u1ea3 v\u00e0 T\u1ed1i \u01b0u h\u00f3a:B\u1eb1ng c\u00e1ch \u0111i s\u00e2u v\u00e0o c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt, c\u00e1c s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd cho ph\u00e9p t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng v\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean. S\u01a1 \u0111\u1ed3 DFD logic so v\u1edbi s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd: T\u00f3m t\u1eaft Kh\u00eda c\u1ea1nh S\u01a1 \u0111\u1ed3 DFD logic S\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd Tr\u1ecdng t\u00e2m Tr\u1eebu t\u01b0\u1ee3ng c\u1ea5p cao v\u1ec1 quy tr\u00ecnh v\u00e0 d\u1eef li\u1ec7u Chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt chi ti\u1ebft M\u1ee5c \u0111\u00edch Ph\u00e2n t\u00edch y\u00eau c\u1ea7u, giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi d\u00f9ng Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft, tri\u1ec3n khai M\u1ee9c \u0111\u1ed9 bi\u1ec3u di\u1ec5n Kh\u00e1i ni\u1ec7m K\u1ef9 thu\u1eadt \u0110\u1ed1i t\u01b0\u1ee3ng m\u1ee5c ti\u00eau C\u00e1c b\u00ean li\u00ean quan, ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i L\u1eadp tr\u00ecnh vi\u00ean, ki\u1ebfn tr\u00fac s\u01b0 h\u1ec7 th\u1ed1ng Ph\u1ea1m vi Ch\u1ee9c n\u0103ng h\u1ec7 th\u1ed1ng t\u1eeb g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng Chi ti\u1ebft k\u1ef9 thu\u1eadt v\u1ec1 tri\u1ec3n khai h\u1ec7 th\u1ed1ng Tr\u1eebu t\u01b0\u1ee3ng Nh\u1ea5n m\u1ea1nh c\u00e1c ch\u1ee9c n\u0103ng v\u00e0 t\u01b0\u01a1ng t\u00e1c thi\u1ebft y\u1ebfu Chuy\u1ec3n \u0111\u1ed5i c\u00e1c th\u00e0nh ph\u1ea7n logic th\u00e0nh c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3 Th\u1eddi \u0111i\u1ec3m s\u1eed d\u1ee5ng Giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft v\u00e0 tri\u1ec3n khai C\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n Quy tr\u00ecnh, lu\u1ed3ng d\u1eef li\u1ec7u, kho d\u1eef li\u1ec7u Ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m, c\u01a1 s\u1edf d\u1eef li\u1ec7u, m\u1ea1ng l\u01b0\u1edbi S\u1eed d\u1ee5ng trong t\u1ed1i \u01b0u h\u00f3a Kh\u00f4ng t\u1eadp trung v\u00e0o t\u1ed1i \u01b0u h\u00f3a X\u00e1c \u0111\u1ecbnh c\u00e1c khu v\u1ef1c c\u1ea7n t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t Ng\u00f4n ng\u1eef D\u1ec5 s\u1eed d\u1ee5ng, kh\u00f4ng chuy\u00ean m\u00f4n Chuy\u00ean m\u00f4n, li\u00ean quan \u0111\u1ebfn c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ee5 th\u1ec3 M\u1ee9c \u0111\u1ed9 chi ti\u1ebft Cao c\u1ea5p Chi ti\u1ebft B\u1ea3ng n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn nhanh v\u1ec1 nh\u1eefng kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa C\u00e1c s\u01a1 \u0111\u1ed3 DFD logic v\u00e0 s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd v\u1ec1 m\u1eb7t t\u1eadp trung, m\u1ee5c \u0111\u00edch, \u0111\u1ed1i t\u01b0\u1ee3ng, ph\u1ea1m vi, m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh li\u00ean quan kh\u00e1c. K\u1ebft lu\u1eadn Trong th\u1ebf gi\u1edbi ph\u00e1t tri\u1ec3n h\u1ec7<a href=\"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/\" rel=\"bookmark\"><span class=\"screen-reader-text\">Hi\u1ec3u v\u1ec1 DFD logic so v\u1edbi DFD v\u1eadt l\u00fd: Khi n\u00e0o v\u00e0 t\u1ea1i sao ch\u00fang ta c\u1ea7n ch\u00fang<\/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-6373","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>Hi\u1ec3u v\u1ec1 DFD logic so v\u1edbi DFD v\u1eadt l\u00fd: Khi n\u00e0o v\u00e0 t\u1ea1i sao ch\u00fang ta c\u1ea7n ch\u00fang - 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\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hi\u1ec3u v\u1ec1 DFD logic so v\u1edbi DFD v\u1eadt l\u00fd: Khi n\u00e0o v\u00e0 t\u1ea1i sao ch\u00fang ta c\u1ea7n ch\u00fang - Visual Paradigm Guides Vietnamese\" \/>\n<meta property=\"og:description\" content=\"Gi\u1edbi thi\u1ec7u S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFDs) l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u0111\u1ec3 tr\u1ef1c quan h\u00f3a lu\u1ed3ng d\u1eef li\u1ec7u b\u00ean trong m\u1ed9t h\u1ec7 th\u1ed1ng. Ch\u00fang gi\u00fap hi\u1ec3u v\u00e0 ghi ch\u00e9p c\u00e1c quy tr\u00ecnh, kho d\u1eef li\u1ec7u v\u00e0 s\u1ef1 di chuy\u1ec3n d\u1eef li\u1ec7u trong m\u1ed9t h\u1ec7 th\u1ed1ng. Hai lo\u1ea1i DFD ch\u00ednh, DFD logic v\u00e0 DFD v\u1eadt l\u00fd, ph\u1ee5c v\u1ee5 nh\u1eefng m\u1ee5c \u0111\u00edch ri\u00eang bi\u1ec7t trong v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n, m\u1ed7i lo\u1ea1i \u0111\u1ec1u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong thi\u1ebft k\u1ebf v\u00e0 tri\u1ec3n khai m\u1ed9t h\u1ec7 th\u1ed1ng. DFD logic DFD logic t\u1eadp trung v\u00e0o c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 quy tr\u00ecnh logic b\u00ean trong h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng \u0111i s\u00e2u v\u00e0o chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p m\u1ed9t tr\u1eebu t\u01b0\u1ee3ng c\u1ea5p cao, nh\u1ea5n m\u1ea1nh v\u00e0o c\u00e1c ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i v\u00e0 t\u01b0\u01a1ng t\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng. DFD logic ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng, khi tr\u1ecdng t\u00e2m l\u00e0 hi\u1ec3u ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng t\u1eeb g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng. Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng DFD logic Ph\u00e2n t\u00edch y\u00eau c\u1ea7u: DFD logic \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong giai \u0111o\u1ea1n ph\u00e2n t\u00edch y\u00eau c\u1ea7u. Ch\u00fang gi\u00fap c\u00e1c nh\u00e0 ph\u00e2n t\u00edch v\u00e0 b\u00ean li\u00ean quan hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c quy tr\u00ecnh v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ed1t l\u00f5i m\u00e0 kh\u00f4ng b\u1ecb sa \u0111\u00e0 v\u00e0o c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt ph\u1ee9c t\u1ea1p. Giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi d\u00f9ng: Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 giao ti\u1ebfp qu\u00fd gi\u00e1 gi\u1eefa c\u00e1c nh\u00e0 ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng v\u00e0 ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i. Ch\u00fang t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 y\u00eau c\u1ea7u v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng b\u1eb1ng ng\u00f4n ng\u1eef d\u1ec5 hi\u1ec3u \u0111\u1ed1i v\u1edbi c\u00e1c b\u00ean li\u00ean quan kh\u00f4ng chuy\u00ean v\u1ec1 k\u1ef9 thu\u1eadt. Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u1ea5p cao: DFD logic h\u1ed7 tr\u1ee3 t\u1ea1o ra b\u1ea3n v\u1ebd t\u1ed5ng quan c\u1ea5p cao cho thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. Ch\u00fang l\u00e0m n\u1ed5i b\u1eadt c\u00e1c quy tr\u00ecnh ch\u00ednh v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u, \u0111\u1eb7t n\u1ec1n t\u1ea3ng cho c\u00e1c giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n ti\u1ebfp theo. T\u1ea1i sao c\u1ea7n DFD logic Tr\u1eebu t\u01b0\u1ee3ng: DFD logic lo\u1ea1i b\u1ecf c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt, cung c\u1ea5p m\u1ed9t bi\u1ec3u di\u1ec5n r\u00f5 r\u00e0ng v\u00e0 s\u00fac t\u00edch v\u1ec1 ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng. \u0110i\u1ec1u n\u00e0y gi\u00fap tr\u00e1nh nh\u1eefng ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft trong c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn ban \u0111\u1ea7u. T\u1eadp trung v\u00e0o ng\u01b0\u1eddi d\u00f9ng: B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng, DFD logic \u0111\u1ea3m b\u1ea3o r\u1eb1ng thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u v\u00e0 k\u1ef3 v\u1ecdng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. DFD v\u1eadt l\u00fd Ng\u01b0\u1ee3c l\u1ea1i, DFD v\u1eadt l\u00fd \u0111i s\u00e2u v\u00e0o c\u00e1c kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt c\u1ee7a vi\u1ec7c tri\u1ec3n khai h\u1ec7 th\u1ed1ng. Ch\u00fang chi ti\u1ebft h\u00f3a c\u00e1ch c\u00e1c th\u00e0nh ph\u1ea7n logic \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong DFD logic \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m, c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n m\u1ea1ng. Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng DFD v\u1eadt l\u00fd Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft: DFD v\u1eadt l\u00fd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft. Ch\u00fang cung c\u1ea5p b\u1ea3n \u0111\u1ed3 h\u00e0nh tr\u00ecnh cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, x\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c quy tr\u00ecnh logic s\u1ebd \u0111\u01b0\u1ee3c tri\u1ec3n khai b\u1eb1ng c\u00e1c c\u00f4ng ngh\u1ec7 v\u00e0 ngu\u1ed3n l\u1ef1c c\u1ee5 th\u1ec3. Giai \u0111o\u1ea1n tri\u1ec3n khai: Khi h\u1ec7 th\u1ed1ng ti\u1ebfn t\u1edbi giai \u0111o\u1ea1n tri\u1ec3n khai, DFD v\u1eadt l\u00fd h\u01b0\u1edbng d\u1eabn c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n chuy\u1ec3n \u0111\u1ed5i thi\u1ebft k\u1ebf logic th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng c\u1ee5 th\u1ec3 b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c th\u00e0nh ph\u1ea7n ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m tham gia. T\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t: DFD v\u1eadt l\u00fd l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng. Ch\u00fang gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn ti\u1ec1m t\u00e0ng v\u00e0 c\u00e1c khu v\u1ef1c c\u1ea7n c\u1ea3i thi\u1ec7n v\u1ec1 m\u1eb7t s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean. T\u1ea1i sao c\u1ea7n DFD v\u1eadt l\u00fd H\u01b0\u1edbng d\u1eabn tri\u1ec3n khai: DFD v\u1eadt l\u00fd cung c\u1ea5p h\u01b0\u1edbng d\u1eabn chi ti\u1ebft cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, n\u00eau r\u00f5 c\u00e1c b\u01b0\u1edbc v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec7n th\u1ef1c h\u00f3a thi\u1ebft k\u1ebf logic. Hi\u1ec7u qu\u1ea3 v\u00e0 T\u1ed1i \u01b0u h\u00f3a:B\u1eb1ng c\u00e1ch \u0111i s\u00e2u v\u00e0o c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt, c\u00e1c s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd cho ph\u00e9p t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng v\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean. S\u01a1 \u0111\u1ed3 DFD logic so v\u1edbi s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd: T\u00f3m t\u1eaft Kh\u00eda c\u1ea1nh S\u01a1 \u0111\u1ed3 DFD logic S\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd Tr\u1ecdng t\u00e2m Tr\u1eebu t\u01b0\u1ee3ng c\u1ea5p cao v\u1ec1 quy tr\u00ecnh v\u00e0 d\u1eef li\u1ec7u Chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt chi ti\u1ebft M\u1ee5c \u0111\u00edch Ph\u00e2n t\u00edch y\u00eau c\u1ea7u, giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi d\u00f9ng Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft, tri\u1ec3n khai M\u1ee9c \u0111\u1ed9 bi\u1ec3u di\u1ec5n Kh\u00e1i ni\u1ec7m K\u1ef9 thu\u1eadt \u0110\u1ed1i t\u01b0\u1ee3ng m\u1ee5c ti\u00eau C\u00e1c b\u00ean li\u00ean quan, ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i L\u1eadp tr\u00ecnh vi\u00ean, ki\u1ebfn tr\u00fac s\u01b0 h\u1ec7 th\u1ed1ng Ph\u1ea1m vi Ch\u1ee9c n\u0103ng h\u1ec7 th\u1ed1ng t\u1eeb g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng Chi ti\u1ebft k\u1ef9 thu\u1eadt v\u1ec1 tri\u1ec3n khai h\u1ec7 th\u1ed1ng Tr\u1eebu t\u01b0\u1ee3ng Nh\u1ea5n m\u1ea1nh c\u00e1c ch\u1ee9c n\u0103ng v\u00e0 t\u01b0\u01a1ng t\u00e1c thi\u1ebft y\u1ebfu Chuy\u1ec3n \u0111\u1ed5i c\u00e1c th\u00e0nh ph\u1ea7n logic th\u00e0nh c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3 Th\u1eddi \u0111i\u1ec3m s\u1eed d\u1ee5ng Giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft v\u00e0 tri\u1ec3n khai C\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n Quy tr\u00ecnh, lu\u1ed3ng d\u1eef li\u1ec7u, kho d\u1eef li\u1ec7u Ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m, c\u01a1 s\u1edf d\u1eef li\u1ec7u, m\u1ea1ng l\u01b0\u1edbi S\u1eed d\u1ee5ng trong t\u1ed1i \u01b0u h\u00f3a Kh\u00f4ng t\u1eadp trung v\u00e0o t\u1ed1i \u01b0u h\u00f3a X\u00e1c \u0111\u1ecbnh c\u00e1c khu v\u1ef1c c\u1ea7n t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t Ng\u00f4n ng\u1eef D\u1ec5 s\u1eed d\u1ee5ng, kh\u00f4ng chuy\u00ean m\u00f4n Chuy\u00ean m\u00f4n, li\u00ean quan \u0111\u1ebfn c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ee5 th\u1ec3 M\u1ee9c \u0111\u1ed9 chi ti\u1ebft Cao c\u1ea5p Chi ti\u1ebft B\u1ea3ng n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn nhanh v\u1ec1 nh\u1eefng kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa C\u00e1c s\u01a1 \u0111\u1ed3 DFD logic v\u00e0 s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd v\u1ec1 m\u1eb7t t\u1eadp trung, m\u1ee5c \u0111\u00edch, \u0111\u1ed1i t\u01b0\u1ee3ng, ph\u1ea1m vi, m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh li\u00ean quan kh\u00e1c. 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Ch\u00fang gi\u00fap hi\u1ec3u v\u00e0 ghi ch\u00e9p c\u00e1c quy tr\u00ecnh, kho d\u1eef li\u1ec7u v\u00e0 s\u1ef1 di chuy\u1ec3n d\u1eef li\u1ec7u trong m\u1ed9t h\u1ec7 th\u1ed1ng. Hai lo\u1ea1i DFD ch\u00ednh, DFD logic v\u00e0 DFD v\u1eadt l\u00fd, ph\u1ee5c v\u1ee5 nh\u1eefng m\u1ee5c \u0111\u00edch ri\u00eang bi\u1ec7t trong v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n, m\u1ed7i lo\u1ea1i \u0111\u1ec1u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong thi\u1ebft k\u1ebf v\u00e0 tri\u1ec3n khai m\u1ed9t h\u1ec7 th\u1ed1ng. DFD logic DFD logic t\u1eadp trung v\u00e0o c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 quy tr\u00ecnh logic b\u00ean trong h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng \u0111i s\u00e2u v\u00e0o chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p m\u1ed9t tr\u1eebu t\u01b0\u1ee3ng c\u1ea5p cao, nh\u1ea5n m\u1ea1nh v\u00e0o c\u00e1c ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i v\u00e0 t\u01b0\u01a1ng t\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng. DFD logic ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng, khi tr\u1ecdng t\u00e2m l\u00e0 hi\u1ec3u ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng t\u1eeb g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng. Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng DFD logic Ph\u00e2n t\u00edch y\u00eau c\u1ea7u: DFD logic \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong giai \u0111o\u1ea1n ph\u00e2n t\u00edch y\u00eau c\u1ea7u. Ch\u00fang gi\u00fap c\u00e1c nh\u00e0 ph\u00e2n t\u00edch v\u00e0 b\u00ean li\u00ean quan hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c quy tr\u00ecnh v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ed1t l\u00f5i m\u00e0 kh\u00f4ng b\u1ecb sa \u0111\u00e0 v\u00e0o c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt ph\u1ee9c t\u1ea1p. Giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi d\u00f9ng: Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 giao ti\u1ebfp qu\u00fd gi\u00e1 gi\u1eefa c\u00e1c nh\u00e0 ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng v\u00e0 ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i. Ch\u00fang t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 y\u00eau c\u1ea7u v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng b\u1eb1ng ng\u00f4n ng\u1eef d\u1ec5 hi\u1ec3u \u0111\u1ed1i v\u1edbi c\u00e1c b\u00ean li\u00ean quan kh\u00f4ng chuy\u00ean v\u1ec1 k\u1ef9 thu\u1eadt. Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u1ea5p cao: DFD logic h\u1ed7 tr\u1ee3 t\u1ea1o ra b\u1ea3n v\u1ebd t\u1ed5ng quan c\u1ea5p cao cho thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. Ch\u00fang l\u00e0m n\u1ed5i b\u1eadt c\u00e1c quy tr\u00ecnh ch\u00ednh v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u, \u0111\u1eb7t n\u1ec1n t\u1ea3ng cho c\u00e1c giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n ti\u1ebfp theo. T\u1ea1i sao c\u1ea7n DFD logic Tr\u1eebu t\u01b0\u1ee3ng: DFD logic lo\u1ea1i b\u1ecf c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt, cung c\u1ea5p m\u1ed9t bi\u1ec3u di\u1ec5n r\u00f5 r\u00e0ng v\u00e0 s\u00fac t\u00edch v\u1ec1 ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng. \u0110i\u1ec1u n\u00e0y gi\u00fap tr\u00e1nh nh\u1eefng ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft trong c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn ban \u0111\u1ea7u. T\u1eadp trung v\u00e0o ng\u01b0\u1eddi d\u00f9ng: B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng, DFD logic \u0111\u1ea3m b\u1ea3o r\u1eb1ng thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u v\u00e0 k\u1ef3 v\u1ecdng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. DFD v\u1eadt l\u00fd Ng\u01b0\u1ee3c l\u1ea1i, DFD v\u1eadt l\u00fd \u0111i s\u00e2u v\u00e0o c\u00e1c kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt c\u1ee7a vi\u1ec7c tri\u1ec3n khai h\u1ec7 th\u1ed1ng. Ch\u00fang chi ti\u1ebft h\u00f3a c\u00e1ch c\u00e1c th\u00e0nh ph\u1ea7n logic \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong DFD logic \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m, c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n m\u1ea1ng. Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng DFD v\u1eadt l\u00fd Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft: DFD v\u1eadt l\u00fd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft. Ch\u00fang cung c\u1ea5p b\u1ea3n \u0111\u1ed3 h\u00e0nh tr\u00ecnh cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, x\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c quy tr\u00ecnh logic s\u1ebd \u0111\u01b0\u1ee3c tri\u1ec3n khai b\u1eb1ng c\u00e1c c\u00f4ng ngh\u1ec7 v\u00e0 ngu\u1ed3n l\u1ef1c c\u1ee5 th\u1ec3. Giai \u0111o\u1ea1n tri\u1ec3n khai: Khi h\u1ec7 th\u1ed1ng ti\u1ebfn t\u1edbi giai \u0111o\u1ea1n tri\u1ec3n khai, DFD v\u1eadt l\u00fd h\u01b0\u1edbng d\u1eabn c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n chuy\u1ec3n \u0111\u1ed5i thi\u1ebft k\u1ebf logic th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng c\u1ee5 th\u1ec3 b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c th\u00e0nh ph\u1ea7n ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m tham gia. T\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t: DFD v\u1eadt l\u00fd l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng. Ch\u00fang gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn ti\u1ec1m t\u00e0ng v\u00e0 c\u00e1c khu v\u1ef1c c\u1ea7n c\u1ea3i thi\u1ec7n v\u1ec1 m\u1eb7t s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean. T\u1ea1i sao c\u1ea7n DFD v\u1eadt l\u00fd H\u01b0\u1edbng d\u1eabn tri\u1ec3n khai: DFD v\u1eadt l\u00fd cung c\u1ea5p h\u01b0\u1edbng d\u1eabn chi ti\u1ebft cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, n\u00eau r\u00f5 c\u00e1c b\u01b0\u1edbc v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec7n th\u1ef1c h\u00f3a thi\u1ebft k\u1ebf logic. Hi\u1ec7u qu\u1ea3 v\u00e0 T\u1ed1i \u01b0u h\u00f3a:B\u1eb1ng c\u00e1ch \u0111i s\u00e2u v\u00e0o c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt, c\u00e1c s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd cho ph\u00e9p t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng v\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng t\u00e0i nguy\u00ean. S\u01a1 \u0111\u1ed3 DFD logic so v\u1edbi s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd: T\u00f3m t\u1eaft Kh\u00eda c\u1ea1nh S\u01a1 \u0111\u1ed3 DFD logic S\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd Tr\u1ecdng t\u00e2m Tr\u1eebu t\u01b0\u1ee3ng c\u1ea5p cao v\u1ec1 quy tr\u00ecnh v\u00e0 d\u1eef li\u1ec7u Chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt chi ti\u1ebft M\u1ee5c \u0111\u00edch Ph\u00e2n t\u00edch y\u00eau c\u1ea7u, giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi d\u00f9ng Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft, tri\u1ec3n khai M\u1ee9c \u0111\u1ed9 bi\u1ec3u di\u1ec5n Kh\u00e1i ni\u1ec7m K\u1ef9 thu\u1eadt \u0110\u1ed1i t\u01b0\u1ee3ng m\u1ee5c ti\u00eau C\u00e1c b\u00ean li\u00ean quan, ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i L\u1eadp tr\u00ecnh vi\u00ean, ki\u1ebfn tr\u00fac s\u01b0 h\u1ec7 th\u1ed1ng Ph\u1ea1m vi Ch\u1ee9c n\u0103ng h\u1ec7 th\u1ed1ng t\u1eeb g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng Chi ti\u1ebft k\u1ef9 thu\u1eadt v\u1ec1 tri\u1ec3n khai h\u1ec7 th\u1ed1ng Tr\u1eebu t\u01b0\u1ee3ng Nh\u1ea5n m\u1ea1nh c\u00e1c ch\u1ee9c n\u0103ng v\u00e0 t\u01b0\u01a1ng t\u00e1c thi\u1ebft y\u1ebfu Chuy\u1ec3n \u0111\u1ed5i c\u00e1c th\u00e0nh ph\u1ea7n logic th\u00e0nh c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3 Th\u1eddi \u0111i\u1ec3m s\u1eed d\u1ee5ng Giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng chi ti\u1ebft v\u00e0 tri\u1ec3n khai C\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n Quy tr\u00ecnh, lu\u1ed3ng d\u1eef li\u1ec7u, kho d\u1eef li\u1ec7u Ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m, c\u01a1 s\u1edf d\u1eef li\u1ec7u, m\u1ea1ng l\u01b0\u1edbi S\u1eed d\u1ee5ng trong t\u1ed1i \u01b0u h\u00f3a Kh\u00f4ng t\u1eadp trung v\u00e0o t\u1ed1i \u01b0u h\u00f3a X\u00e1c \u0111\u1ecbnh c\u00e1c khu v\u1ef1c c\u1ea7n t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t Ng\u00f4n ng\u1eef D\u1ec5 s\u1eed d\u1ee5ng, kh\u00f4ng chuy\u00ean m\u00f4n Chuy\u00ean m\u00f4n, li\u00ean quan \u0111\u1ebfn c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ee5 th\u1ec3 M\u1ee9c \u0111\u1ed9 chi ti\u1ebft Cao c\u1ea5p Chi ti\u1ebft B\u1ea3ng n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn nhanh v\u1ec1 nh\u1eefng kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa C\u00e1c s\u01a1 \u0111\u1ed3 DFD logic v\u00e0 s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd v\u1ec1 m\u1eb7t t\u1eadp trung, m\u1ee5c \u0111\u00edch, \u0111\u1ed1i t\u01b0\u1ee3ng, ph\u1ea1m vi, m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh li\u00ean quan kh\u00e1c. K\u1ebft lu\u1eadn Trong th\u1ebf gi\u1edbi ph\u00e1t tri\u1ec3n h\u1ec7Hi\u1ec3u v\u1ec1 DFD logic so v\u1edbi DFD v\u1eadt l\u00fd: Khi n\u00e0o v\u00e0 t\u1ea1i sao ch\u00fang ta c\u1ea7n ch\u00fang","og_url":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/","og_site_name":"Visual Paradigm Guides Vietnamese","article_published_time":"2026-02-04T09:20:17+00:00","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"vpadmin","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"4 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/#article","isPartOf":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/"},"headline":"Hi\u1ec3u v\u1ec1 DFD logic so v\u1edbi DFD v\u1eadt l\u00fd: Khi n\u00e0o v\u00e0 t\u1ea1i sao ch\u00fang ta c\u1ea7n ch\u00fang","datePublished":"2026-02-04T09:20:17+00:00","mainEntityOfPage":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/"},"wordCount":1784,"commentCount":0,"articleSection":["DFD"],"inLanguage":"vi","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/","url":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/","name":"Hi\u1ec3u v\u1ec1 DFD logic so v\u1edbi DFD v\u1eadt l\u00fd: Khi n\u00e0o v\u00e0 t\u1ea1i sao ch\u00fang ta c\u1ea7n ch\u00fang - Visual Paradigm Guides Vietnamese","isPartOf":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/#website"},"datePublished":"2026-02-04T09:20:17+00:00","author":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/#\/schema\/person\/292e97a06c90d6d605ddfd451bfdfe6f"},"breadcrumb":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/#breadcrumb"},"inLanguage":"vi","potentialAction":[{"@type":"ReadAction","target":["https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/guides.visual-paradigm.com\/vn\/understanding-logical-dfd-vs-physical-dfd-when-and-why-we-need-them\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/guides.visual-paradigm.com\/vn\/"},{"@type":"ListItem","position":2,"name":"DFD","item":"https:\/\/guides.visual-paradigm.com\/vn\/category\/dfd\/"},{"@type":"ListItem","position":3,"name":"Hi\u1ec3u v\u1ec1 DFD logic so v\u1edbi DFD v\u1eadt l\u00fd: Khi n\u00e0o v\u00e0 t\u1ea1i sao ch\u00fang ta c\u1ea7n ch\u00fang"}]},{"@type":"WebSite","@id":"https:\/\/guides.visual-paradigm.com\/vn\/#website","url":"https:\/\/guides.visual-paradigm.com\/vn\/","name":"Visual Paradigm Guides Vietnamese","description":"Smart guides for an AI-driven world","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/guides.visual-paradigm.com\/vn\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/guides.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/posts\/6373","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guides.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guides.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guides.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/guides.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/comments?post=6373"}],"version-history":[{"count":0,"href":"https:\/\/guides.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/posts\/6373\/revisions"}],"wp:attachment":[{"href":"https:\/\/guides.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/media?parent=6373"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guides.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/categories?post=6373"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guides.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/tags?post=6373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}