{"id":6381,"date":"2026-02-04T17:46:19","date_gmt":"2026-02-04T09:46:19","guid":{"rendered":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-success-a-guide-to-data-flow-diagrams-dfd\/"},"modified":"2026-02-04T17:46:19","modified_gmt":"2026-02-04T09:46:19","slug":"navigating-success-a-guide-to-data-flow-diagrams-dfd","status":"publish","type":"post","link":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-success-a-guide-to-data-flow-diagrams-dfd\/","title":{"rendered":"\u0110i\u1ec1u h\u01b0\u1edbng Th\u00e0nh c\u00f4ng: H\u01b0\u1edbng d\u1eabn v\u1ec1 S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD)"},"content":{"rendered":"

Gi\u1edbi thi\u1ec7u<\/h2>\n

Trong b\u1ee9c tranh r\u1ed9ng l\u1edbn c\u1ee7a th\u00f4ng tin v\u00e0 c\u00f4ng ngh\u1ec7, vi\u1ec7c hi\u1ec3u v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t cho th\u00e0nh c\u00f4ng. D\u00f9 b\u1ea1n \u0111ang kh\u00e1m ph\u00e1 s\u00e2u s\u1eafc v\u1ec1 Internet, t\u1ed1i \u01b0u h\u00f3a c\u00e1c chi\u1ebfn l\u01b0\u1ee3c ti\u1ebfp th\u1ecb hay gi\u1ea3i m\u00e3 h\u00e0nh vi kh\u00e1ch h\u00e0ng, then ch\u1ed1t n\u1eb1m \u1edf vi\u1ec7c t\u1ed5 ch\u1ee9c lu\u1ed3ng d\u1eef li\u1ec7u. M\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u<\/a> (DFD). \u0110\u1eebng lo l\u1eafng, n\u00f3 kh\u00f4ng ph\u1ee9c t\u1ea1p nh\u01b0 nghe c\u00f3 v\u1ebb.<\/p>\n

<\/p>\n

S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD) l\u00e0 g\u00ec?<\/h2>\n

S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u l\u00e0 m\u1ed9t bi\u1ec3u di\u1ec5n tr\u1ef1c quan m\u00f4 t\u1ea3 \u0111\u1ea7u v\u00e0o, qu\u00e1 tr\u00ecnh v\u00e0 \u0111\u1ea7u ra c\u1ee7a d\u1eef li\u1ec7u trong m\u1ed9t h\u1ec7 th\u1ed1ng. Lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c minh h\u1ecda b\u1eb1ng c\u00e1c \u0111\u01b0\u1eddng v\u00e0 m\u0169i t\u00ean, trong khi k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng c\u00e1c h\u00ecnh d\u1ea1ng nh\u01b0 h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 h\u00ecnh elip. S\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn logic v\u00e0 c\u00f3 t\u1ed5 ch\u1ee9c v\u1ec1 c\u00e1ch d\u1eef li\u1ec7u di chuy\u1ec3n qua h\u1ec7 th\u1ed1ng, gi\u00fap c\u00e1c qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u h\u01a1n.<\/p>\n

<\/p>\n

T\u1ea1o m\u1ed9t s\u01a1 \u0111\u1ed3 DFD<\/h2>\n

S\u01a1 \u0111\u1ed3 DFD c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c v\u1ebd tay ho\u1eb7c t\u1ea1o b\u1eb1ng ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng m\u1edbi ho\u1eb7c \u0111\u00e1nh gi\u00e1 c\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n c\u00f3. S\u1ef1 \u0111\u01a1n gi\u1ea3n c\u1ee7a DFD gi\u00fap giao ti\u1ebfp d\u1ec5 d\u00e0ng h\u01a1n v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p m\u00e0 vi\u1ec7c gi\u1ea3i th\u00edch b\u1eb1ng l\u1eddi n\u00f3i c\u00f3 th\u1ec3 g\u1eb7p kh\u00f3 kh\u0103n.<\/p>\n

S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh<\/h2>\n

Khi c\u1ea7n kh\u00e1m ph\u00e1 s\u00e2u h\u01a1n v\u1ec1 m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ee5 th\u1ec3, ng\u01b0\u1eddi ta s\u1ebd s\u1eed d\u1ee5ng S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 S\u01a1 \u0111\u1ed3 DFD c\u1ea5p \u0111\u1ed9 b\u1ed1i c\u1ea3nh. S\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p chi ti\u1ebft h\u01a1n v\u1ec1 m\u1ed9t qu\u00e1 tr\u00ecnh duy nh\u1ea5t v\u00e0 minh h\u1ecda m\u1ed1i li\u00ean h\u1ec7 c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i nh\u01b0 kho d\u1eef li\u1ec7u v\u00e0 t\u1ed5 ch\u1ee9c.<\/p>\n

C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u<\/h2>\n

Hai k\u00fd hi\u1ec7u n\u1ed5i b\u1eadt cho DFD l\u00e0 Yourdon v\u00e0 Coad, v\u00e0 Gane v\u00e0 Sarson. C\u1ea3 hai \u0111\u1ec1u s\u1eed d\u1ee5ng h\u00ecnh vu\u00f4ng cho c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, m\u0169i t\u00ean cho lu\u1ed3ng d\u1eef li\u1ec7u, v\u00e0 h\u00ecnh ch\u1eef nh\u1eadt (ho\u1eb7c h\u00ecnh thoi) cho kho d\u1eef li\u1ec7u. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh n\u1eb1m \u1edf c\u00e1ch bi\u1ec3u di\u1ec5n c\u00e1c qu\u00e1 tr\u00ecnh.<\/p>\n

    \n
  1. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i: C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i l\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i giao ti\u1ebfp tr\u1ef1c ti\u1ebfp v\u1edbi h\u1ec7 th\u1ed1ng \u0111ang \u0111\u01b0\u1ee3c xem x\u00e9t. Ch\u00fang l\u00e0 ngu\u1ed3n ch\u00ednh c\u1ee7a d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra, \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf c\u00e1c m\u00e9p ngo\u00e0i c\u1ee7a s\u01a1 \u0111\u1ed3.<\/li>\n
  2. Qu\u00e1 tr\u00ecnh: C\u00e1c qu\u00e1 tr\u00ecnh l\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp thay \u0111\u1ed5i d\u1eef li\u1ec7u. C\u00e1c nh\u00e3n \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o m\u1ed7i qu\u00e1 tr\u00ecnh \u0111\u1ec3 m\u00f4 t\u1ea3 h\u00e0nh \u0111\u1ed9ng \u0111ang di\u1ec5n ra, c\u00f3 th\u1ec3 l\u00e0 c\u00e1c ph\u00e9p t\u00ednh, s\u1eafp x\u1ebfp d\u1eef li\u1ec7u ho\u1eb7c \u00e1p d\u1ee5ng c\u00e1c quy t\u1eafc kinh doanh c\u1ee5 th\u1ec3.<\/li>\n
  3. Kho d\u1eef li\u1ec7u: Kho d\u1eef li\u1ec7u l\u00e0 c\u00e1c t\u1ec7p ho\u1eb7c khu v\u1ef1c l\u01b0u tr\u1eef ch\u1ee9a th\u00f4ng tin c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy xu\u1ea5t sau n\u00e0y. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c b\u1ea3ng t\u00ednh v\u1edbi c\u00e1c nh\u00e3n gi\u1ea3i th\u00edch m\u1ee5c \u0111\u00edch c\u1ee7a ch\u00fang.<\/li>\n
  4. Lu\u1ed3ng d\u1eef li\u1ec7u: C\u00e1c \u0111\u01b0\u1eddng c\u00f3 m\u0169i t\u00ean bi\u1ec3u di\u1ec5n lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, qu\u00e1 tr\u00ecnh v\u00e0 kho d\u1eef li\u1ec7u. Nh\u1eefng \u0111\u01b0\u1eddng n\u00e0y, \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n, k\u1ebft n\u1ed1i t\u1ea5t c\u1ea3 th\u00f4ng tin l\u1ea1i v\u1edbi nhau.<\/li>\n<\/ol>\n

    Hi\u1ec3u v\u1ec1 DFD<\/h2>\n

    \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi kh\u00f4ng quen thu\u1ed9c v\u1edbi l\u1eadp tr\u00ecnh ho\u1eb7c k\u1ef9 thu\u1eadt, DFD c\u00f3 th\u1ec3 tr\u00f4ng ph\u1ee9c t\u1ea1p. Tuy nhi\u00ean, v\u1ec1 b\u1ea3n ch\u1ea5t, ch\u00fang gi\u1ea3i th\u00edch \u0111i\u1ec1u g\u00ec x\u1ea3y ra v\u1edbi d\u1eef li\u1ec7u khi th\u1ef1c hi\u1ec7n m\u1ed9t h\u00e0nh \u0111\u1ed9ng c\u1ee5 th\u1ec3 \u2014 t\u1eeb \u0111\u1ea7u v\u00e0o \u0111\u1ebfn \u0111\u1ea7u ra. C\u00e1c DFD \u0111\u01a1n gi\u1ea3n th\u01b0\u1eddng c\u00f3 m\u00e0u \u0111\u01a1n s\u1eafc, trong khi c\u00e1c s\u01a1 \u0111\u1ed3 ph\u1ee9c t\u1ea1p h\u01a1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nhi\u1ec1u m\u00e0u s\u1eafc \u0111\u1ec3 bi\u1ec3u di\u1ec5n c\u00e1c bi\u1ebfn kh\u00e1c nhau.<\/p>\n

    Quy t\u1eafc DFD<\/h2>\n

    \u0110\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 c\u00f3 \u00fd ngh\u0129a, h\u00e3y tu\u00e2n theo c\u00e1c quy t\u1eafc sau:<\/p>\n

      \n
    1. M\u1ed7i qu\u00e1 tr\u00ecnh v\u00e0 kho d\u1eef li\u1ec7u ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t m\u1ed9t \u0111\u1ea7u v\u00e0o v\u00e0 m\u1ed9t \u0111\u1ea7u ra.<\/li>\n
    2. C\u00e1c kho d\u1eef li\u1ec7u ph\u1ea3i \u0111i qua m\u1ed9t qu\u00e1 tr\u00ecnh.<\/li>\n
    3. M\u1ed7i qu\u00e1 tr\u00ecnh trong DFD ph\u1ea3i k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t qu\u00e1 tr\u00ecnh kh\u00e1c ho\u1eb7c m\u1ed9t \u0111i\u1ec3m ki\u1ec3m tra nh\u01b0 m\u1ed9t kho d\u1eef li\u1ec7u.<\/li>\n<\/ol>\n

      T\u1ea1o m\u1ed9t S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u<\/h2>\n

      M\u1eb7c d\u00f9 m\u1ed9t s\u1ed1 k\u1ef9 s\u01b0 th\u00edch ph\u01b0\u01a1ng ph\u00e1p v\u1ebd tay truy\u1ec1n th\u1ed1ng, c\u00e1c gi\u1ea3i ph\u00e1p ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i cung c\u1ea5p c\u00e1ch ti\u1ebfp c\u1eadn hi\u1ec7u qu\u1ea3 h\u01a1n.Visual Paradigm<\/a> n\u1ed5i b\u1eadt nh\u01b0 m\u1ed9t l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u cho nh\u1eefng ng\u01b0\u1eddi nghi\u00eam t\u00fac \u0111\u00e1nh gi\u00e1 c\u00e1c gi\u1ea3i ph\u00e1p DFD.<\/p>\n

      K\u1ebft lu\u1eadn:<\/h2>\n

      Trong b\u1ed1i c\u1ea3nh d\u1ef1a tr\u00ean d\u1eef li\u1ec7u, th\u00e0nh th\u1ea1o ngh\u1ec7 thu\u1eadt tr\u1ef1c quan h\u00f3a lu\u1ed3ng th\u00f4ng tin l\u00e0 m\u1ed9t k\u1ef9 n\u0103ng m\u1ea1nh m\u1ebd.S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u<\/a>, v\u1edbi s\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 r\u00f5 r\u00e0ng c\u1ee7a ch\u00fang, \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 v\u00f4 gi\u00e1 trong vi\u1ec7c thi\u1ebft k\u1ebf, ph\u00e2n t\u00edch v\u00e0 t\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng. H\u00e3y \u0111\u00f3n nh\u1eadn th\u1ebf gi\u1edbi c\u1ee7a DFD, v\u00e0 b\u1ea1n s\u1ebd t\u1ef1 tin v\u00e0 ch\u00ednh x\u00e1c khi l\u01b0\u1edbt qua \u0111\u1ea1i d\u01b0\u01a1ng d\u1eef li\u1ec7u.<\/p>\n

      V\u00ed d\u1ee5 v\u1ec1 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u<\/h2>\n

      S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin. Trong ph\u1ea7n n\u00e0y, ch\u00fang t\u00f4i \u0111\u00e3 s\u01b0u t\u1ea7m m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 DFD \u0111\u1ec3 b\u1ea1n tham kh\u1ea3o. B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 DFD c\u1ee7a ri\u00eang m\u00ecnh tr\u1ef1c tuy\u1ebfn b\u1eb1ng nh\u1eefng v\u00ed d\u1ee5 n\u00e0y, s\u1eed d\u1ee5ng Visual Paradigm Online.<\/p>\n

      \u00a0<\/p>\n

      S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cho \u1ee9ng d\u1ee5ng si\u00eau th\u1ecb<\/strong>: (Ch\u1ec9nh s\u1eeda s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u n\u00e0y<\/a>v\u1edbi c\u00f4ng c\u1ee5 t\u1ea1o s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ee7a Visual Paradigm Online.)<\/p>\n

      \"\"<\/p>\n

      V\u00ed d\u1ee5 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u: H\u1ec7 th\u1ed1ng \u0111\u1eb7t m\u00f3n \u0103n<\/strong>\u00a0(Ch\u1ec9nh s\u1eeda s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u n\u00e0y<\/a>)<\/p>\n

      \"\"<\/p>\n

      \u00a0<\/p>\n

      V\u00ed d\u1ee5 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u: X\u01b0\u1edfng b\u1ea3o tr\u00ec ph\u01b0\u01a1ng ti\u1ec7n (Ch\u1ec9nh s\u1eeda ngay<\/a>)<\/p>\n

      \"\"<\/p>\n

      \u00a0<\/p>\n

      L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u1ea1o s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u<\/h2>\n

      B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 DFD c\u1ee7a ri\u00eang m\u00ecnh b\u1eb1ng c\u00f4ng c\u1ee5 t\u1ea1o s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u tr\u1ef1c tuy\u1ebfn c\u1ee7a Visual Paradigm. Ch\u00fang t\u00f4i cung c\u1ea5p cho b\u1ea1n m\u1ed9t b\u1ed9 s\u01b0u t\u1eadp phong ph\u00fa c\u00e1c k\u00fd hi\u1ec7u DFD v\u00e0 m\u1eabu DFD \u0111\u1ec3 minh h\u1ecda lu\u1ed3ng d\u1eef li\u1ec7u trong h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n.<\/p>\n

      Mu\u1ed1n t\u1ea1o m\u1ed9t s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ngay b\u00e2y gi\u1edd?Th\u1eed Visual Paradigm<\/a>. V\u1ebd s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u nhanh ch\u00f3ng v\u00e0 d\u1ec5 d\u00e0ng v\u1edbi Visual Paradigm.<\/p>\n","protected":false},"excerpt":{"rendered":"

      Gi\u1edbi thi\u1ec7u Trong b\u1ee9c tranh r\u1ed9ng l\u1edbn c\u1ee7a th\u00f4ng tin v\u00e0 c\u00f4ng ngh\u1ec7, vi\u1ec7c hi\u1ec3u v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t cho th\u00e0nh c\u00f4ng. D\u00f9 b\u1ea1n \u0111ang kh\u00e1m ph\u00e1 s\u00e2u s\u1eafc v\u1ec1 Internet, t\u1ed1i \u01b0u h\u00f3a c\u00e1c chi\u1ebfn l\u01b0\u1ee3c ti\u1ebfp th\u1ecb hay gi\u1ea3i m\u00e3 h\u00e0nh vi kh\u00e1ch h\u00e0ng, then ch\u1ed1t n\u1eb1m \u1edf vi\u1ec7c t\u1ed5 ch\u1ee9c lu\u1ed3ng d\u1eef li\u1ec7u. M\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD). \u0110\u1eebng lo l\u1eafng, n\u00f3 kh\u00f4ng ph\u1ee9c t\u1ea1p nh\u01b0 nghe c\u00f3 v\u1ebb. S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD) l\u00e0 g\u00ec? S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u l\u00e0 m\u1ed9t bi\u1ec3u di\u1ec5n tr\u1ef1c quan m\u00f4 t\u1ea3 \u0111\u1ea7u v\u00e0o, qu\u00e1 tr\u00ecnh v\u00e0 \u0111\u1ea7u ra c\u1ee7a d\u1eef li\u1ec7u trong m\u1ed9t h\u1ec7 th\u1ed1ng. Lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c minh h\u1ecda b\u1eb1ng c\u00e1c \u0111\u01b0\u1eddng v\u00e0 m\u0169i t\u00ean, trong khi k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng c\u00e1c h\u00ecnh d\u1ea1ng nh\u01b0 h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 h\u00ecnh elip. S\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn logic v\u00e0 c\u00f3 t\u1ed5 ch\u1ee9c v\u1ec1 c\u00e1ch d\u1eef li\u1ec7u di chuy\u1ec3n qua h\u1ec7 th\u1ed1ng, gi\u00fap c\u00e1c qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u h\u01a1n. T\u1ea1o m\u1ed9t s\u01a1 \u0111\u1ed3 DFD S\u01a1 \u0111\u1ed3 DFD c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c v\u1ebd tay ho\u1eb7c t\u1ea1o b\u1eb1ng ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng m\u1edbi ho\u1eb7c \u0111\u00e1nh gi\u00e1 c\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n c\u00f3. S\u1ef1 \u0111\u01a1n gi\u1ea3n c\u1ee7a DFD gi\u00fap giao ti\u1ebfp d\u1ec5 d\u00e0ng h\u01a1n v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p m\u00e0 vi\u1ec7c gi\u1ea3i th\u00edch b\u1eb1ng l\u1eddi n\u00f3i c\u00f3 th\u1ec3 g\u1eb7p kh\u00f3 kh\u0103n. S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh Khi c\u1ea7n kh\u00e1m ph\u00e1 s\u00e2u h\u01a1n v\u1ec1 m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ee5 th\u1ec3, ng\u01b0\u1eddi ta s\u1ebd s\u1eed d\u1ee5ng S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 S\u01a1 \u0111\u1ed3 DFD c\u1ea5p \u0111\u1ed9 b\u1ed1i c\u1ea3nh. S\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p chi ti\u1ebft h\u01a1n v\u1ec1 m\u1ed9t qu\u00e1 tr\u00ecnh duy nh\u1ea5t v\u00e0 minh h\u1ecda m\u1ed1i li\u00ean h\u1ec7 c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i nh\u01b0 kho d\u1eef li\u1ec7u v\u00e0 t\u1ed5 ch\u1ee9c. C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u Hai k\u00fd hi\u1ec7u n\u1ed5i b\u1eadt cho DFD l\u00e0 Yourdon v\u00e0 Coad, v\u00e0 Gane v\u00e0 Sarson. C\u1ea3 hai \u0111\u1ec1u s\u1eed d\u1ee5ng h\u00ecnh vu\u00f4ng cho c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, m\u0169i t\u00ean cho lu\u1ed3ng d\u1eef li\u1ec7u, v\u00e0 h\u00ecnh ch\u1eef nh\u1eadt (ho\u1eb7c h\u00ecnh thoi) cho kho d\u1eef li\u1ec7u. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh n\u1eb1m \u1edf c\u00e1ch bi\u1ec3u di\u1ec5n c\u00e1c qu\u00e1 tr\u00ecnh. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i: C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i l\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i giao ti\u1ebfp tr\u1ef1c ti\u1ebfp v\u1edbi h\u1ec7 th\u1ed1ng \u0111ang \u0111\u01b0\u1ee3c xem x\u00e9t. Ch\u00fang l\u00e0 ngu\u1ed3n ch\u00ednh c\u1ee7a d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra, \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf c\u00e1c m\u00e9p ngo\u00e0i c\u1ee7a s\u01a1 \u0111\u1ed3. Qu\u00e1 tr\u00ecnh: C\u00e1c qu\u00e1 tr\u00ecnh l\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp thay \u0111\u1ed5i d\u1eef li\u1ec7u. C\u00e1c nh\u00e3n \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o m\u1ed7i qu\u00e1 tr\u00ecnh \u0111\u1ec3 m\u00f4 t\u1ea3 h\u00e0nh \u0111\u1ed9ng \u0111ang di\u1ec5n ra, c\u00f3 th\u1ec3 l\u00e0 c\u00e1c ph\u00e9p t\u00ednh, s\u1eafp x\u1ebfp d\u1eef li\u1ec7u ho\u1eb7c \u00e1p d\u1ee5ng c\u00e1c quy t\u1eafc kinh doanh c\u1ee5 th\u1ec3. Kho d\u1eef li\u1ec7u: Kho d\u1eef li\u1ec7u l\u00e0 c\u00e1c t\u1ec7p ho\u1eb7c khu v\u1ef1c l\u01b0u tr\u1eef ch\u1ee9a th\u00f4ng tin c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy xu\u1ea5t sau n\u00e0y. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c b\u1ea3ng t\u00ednh v\u1edbi c\u00e1c nh\u00e3n gi\u1ea3i th\u00edch m\u1ee5c \u0111\u00edch c\u1ee7a ch\u00fang. Lu\u1ed3ng d\u1eef li\u1ec7u: C\u00e1c \u0111\u01b0\u1eddng c\u00f3 m\u0169i t\u00ean bi\u1ec3u di\u1ec5n lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, qu\u00e1 tr\u00ecnh v\u00e0 kho d\u1eef li\u1ec7u. Nh\u1eefng \u0111\u01b0\u1eddng n\u00e0y, \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n, k\u1ebft n\u1ed1i t\u1ea5t c\u1ea3 th\u00f4ng tin l\u1ea1i v\u1edbi nhau. Hi\u1ec3u v\u1ec1 DFD \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi kh\u00f4ng quen thu\u1ed9c v\u1edbi l\u1eadp tr\u00ecnh ho\u1eb7c k\u1ef9 thu\u1eadt, DFD c\u00f3 th\u1ec3 tr\u00f4ng ph\u1ee9c t\u1ea1p. Tuy nhi\u00ean, v\u1ec1 b\u1ea3n ch\u1ea5t, ch\u00fang gi\u1ea3i th\u00edch \u0111i\u1ec1u g\u00ec x\u1ea3y ra v\u1edbi d\u1eef li\u1ec7u khi th\u1ef1c hi\u1ec7n m\u1ed9t h\u00e0nh \u0111\u1ed9ng c\u1ee5 th\u1ec3 \u2014 t\u1eeb \u0111\u1ea7u v\u00e0o \u0111\u1ebfn \u0111\u1ea7u ra. C\u00e1c DFD \u0111\u01a1n gi\u1ea3n th\u01b0\u1eddng c\u00f3 m\u00e0u \u0111\u01a1n s\u1eafc, trong khi c\u00e1c s\u01a1 \u0111\u1ed3 ph\u1ee9c t\u1ea1p h\u01a1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nhi\u1ec1u m\u00e0u s\u1eafc \u0111\u1ec3 bi\u1ec3u di\u1ec5n c\u00e1c bi\u1ebfn kh\u00e1c nhau. Quy t\u1eafc DFD \u0110\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 c\u00f3 \u00fd ngh\u0129a, h\u00e3y tu\u00e2n theo c\u00e1c quy t\u1eafc sau: M\u1ed7i qu\u00e1 tr\u00ecnh v\u00e0 kho d\u1eef li\u1ec7u ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t m\u1ed9t \u0111\u1ea7u v\u00e0o v\u00e0 m\u1ed9t \u0111\u1ea7u ra. C\u00e1c kho d\u1eef li\u1ec7u ph\u1ea3i \u0111i qua m\u1ed9t qu\u00e1 tr\u00ecnh. M\u1ed7i qu\u00e1 tr\u00ecnh trong DFD ph\u1ea3i k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t qu\u00e1 tr\u00ecnh kh\u00e1c ho\u1eb7c m\u1ed9t \u0111i\u1ec3m ki\u1ec3m tra nh\u01b0 m\u1ed9t kho d\u1eef li\u1ec7u. T\u1ea1o m\u1ed9t S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u M\u1eb7c d\u00f9 m\u1ed9t s\u1ed1 k\u1ef9 s\u01b0 th\u00edch ph\u01b0\u01a1ng ph\u00e1p v\u1ebd tay truy\u1ec1n th\u1ed1ng, c\u00e1c gi\u1ea3i ph\u00e1p ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i cung c\u1ea5p c\u00e1ch ti\u1ebfp c\u1eadn hi\u1ec7u qu\u1ea3 h\u01a1n.Visual Paradigm n\u1ed5i b\u1eadt nh\u01b0 m\u1ed9t l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u cho nh\u1eefng ng\u01b0\u1eddi nghi\u00eam t\u00fac \u0111\u00e1nh gi\u00e1 c\u00e1c gi\u1ea3i ph\u00e1p DFD. K\u1ebft lu\u1eadn: Trong b\u1ed1i c\u1ea3nh d\u1ef1a tr\u00ean d\u1eef li\u1ec7u, th\u00e0nh th\u1ea1o ngh\u1ec7 thu\u1eadt tr\u1ef1c quan h\u00f3a lu\u1ed3ng th\u00f4ng tin l\u00e0 m\u1ed9t k\u1ef9 n\u0103ng m\u1ea1nh m\u1ebd.S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u, v\u1edbi s\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 r\u00f5 r\u00e0ng c\u1ee7a ch\u00fang, \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 v\u00f4 gi\u00e1 trong vi\u1ec7c thi\u1ebft k\u1ebf, ph\u00e2n t\u00edch v\u00e0 t\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng. H\u00e3y \u0111\u00f3n nh\u1eadn th\u1ebf gi\u1edbi c\u1ee7a DFD, v\u00e0 b\u1ea1n s\u1ebd t\u1ef1 tin v\u00e0 ch\u00ednh x\u00e1c khi l\u01b0\u1edbt qua \u0111\u1ea1i d\u01b0\u01a1ng d\u1eef li\u1ec7u. V\u00ed d\u1ee5 v\u1ec1 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin. Trong ph\u1ea7n n\u00e0y, ch\u00fang t\u00f4i \u0111\u00e3 s\u01b0u t\u1ea7m m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 DFD \u0111\u1ec3 b\u1ea1n tham kh\u1ea3o. B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 DFD c\u1ee7a ri\u00eang m\u00ecnh tr\u1ef1c tuy\u1ebfn b\u1eb1ng nh\u1eefng v\u00ed d\u1ee5 n\u00e0y, s\u1eed d\u1ee5ng Visual Paradigm Online. \u00a0 S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cho \u1ee9ng d\u1ee5ng si\u00eau th\u1ecb: (Ch\u1ec9nh s\u1eeda s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u n\u00e0yv\u1edbi c\u00f4ng c\u1ee5 t\u1ea1o s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ee7a Visual Paradigm Online.) V\u00ed d\u1ee5 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u: H\u1ec7 th\u1ed1ng \u0111\u1eb7t m\u00f3n \u0103n\u00a0(Ch\u1ec9nh s\u1eeda s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef\u0110i\u1ec1u h\u01b0\u1edbng Th\u00e0nh c\u00f4ng: H\u01b0\u1edbng d\u1eabn v\u1ec1 S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD)<\/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-6381","post","type-post","status-publish","format-standard","hentry","category-dfd"],"yoast_head":"\n\u0110i\u1ec1u h\u01b0\u1edbng Th\u00e0nh c\u00f4ng: H\u01b0\u1edbng d\u1eabn v\u1ec1 S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD) - 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-success-a-guide-to-data-flow-diagrams-dfd\/\" \/>\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 Th\u00e0nh c\u00f4ng: H\u01b0\u1edbng d\u1eabn v\u1ec1 S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD) - Visual Paradigm Guides Vietnamese\" \/>\n<meta property=\"og:description\" content=\"Gi\u1edbi thi\u1ec7u Trong b\u1ee9c tranh r\u1ed9ng l\u1edbn c\u1ee7a th\u00f4ng tin v\u00e0 c\u00f4ng ngh\u1ec7, vi\u1ec7c hi\u1ec3u v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t cho th\u00e0nh c\u00f4ng. D\u00f9 b\u1ea1n \u0111ang kh\u00e1m ph\u00e1 s\u00e2u s\u1eafc v\u1ec1 Internet, t\u1ed1i \u01b0u h\u00f3a c\u00e1c chi\u1ebfn l\u01b0\u1ee3c ti\u1ebfp th\u1ecb hay gi\u1ea3i m\u00e3 h\u00e0nh vi kh\u00e1ch h\u00e0ng, then ch\u1ed1t n\u1eb1m \u1edf vi\u1ec7c t\u1ed5 ch\u1ee9c lu\u1ed3ng d\u1eef li\u1ec7u. M\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD). \u0110\u1eebng lo l\u1eafng, n\u00f3 kh\u00f4ng ph\u1ee9c t\u1ea1p nh\u01b0 nghe c\u00f3 v\u1ebb. S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD) l\u00e0 g\u00ec? S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u l\u00e0 m\u1ed9t bi\u1ec3u di\u1ec5n tr\u1ef1c quan m\u00f4 t\u1ea3 \u0111\u1ea7u v\u00e0o, qu\u00e1 tr\u00ecnh v\u00e0 \u0111\u1ea7u ra c\u1ee7a d\u1eef li\u1ec7u trong m\u1ed9t h\u1ec7 th\u1ed1ng. Lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c minh h\u1ecda b\u1eb1ng c\u00e1c \u0111\u01b0\u1eddng v\u00e0 m\u0169i t\u00ean, trong khi k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng c\u00e1c h\u00ecnh d\u1ea1ng nh\u01b0 h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 h\u00ecnh elip. S\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn logic v\u00e0 c\u00f3 t\u1ed5 ch\u1ee9c v\u1ec1 c\u00e1ch d\u1eef li\u1ec7u di chuy\u1ec3n qua h\u1ec7 th\u1ed1ng, gi\u00fap c\u00e1c qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u h\u01a1n. T\u1ea1o m\u1ed9t s\u01a1 \u0111\u1ed3 DFD S\u01a1 \u0111\u1ed3 DFD c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c v\u1ebd tay ho\u1eb7c t\u1ea1o b\u1eb1ng ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng m\u1edbi ho\u1eb7c \u0111\u00e1nh gi\u00e1 c\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n c\u00f3. S\u1ef1 \u0111\u01a1n gi\u1ea3n c\u1ee7a DFD gi\u00fap giao ti\u1ebfp d\u1ec5 d\u00e0ng h\u01a1n v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p m\u00e0 vi\u1ec7c gi\u1ea3i th\u00edch b\u1eb1ng l\u1eddi n\u00f3i c\u00f3 th\u1ec3 g\u1eb7p kh\u00f3 kh\u0103n. S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh Khi c\u1ea7n kh\u00e1m ph\u00e1 s\u00e2u h\u01a1n v\u1ec1 m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ee5 th\u1ec3, ng\u01b0\u1eddi ta s\u1ebd s\u1eed d\u1ee5ng S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 S\u01a1 \u0111\u1ed3 DFD c\u1ea5p \u0111\u1ed9 b\u1ed1i c\u1ea3nh. S\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p chi ti\u1ebft h\u01a1n v\u1ec1 m\u1ed9t qu\u00e1 tr\u00ecnh duy nh\u1ea5t v\u00e0 minh h\u1ecda m\u1ed1i li\u00ean h\u1ec7 c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i nh\u01b0 kho d\u1eef li\u1ec7u v\u00e0 t\u1ed5 ch\u1ee9c. C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u Hai k\u00fd hi\u1ec7u n\u1ed5i b\u1eadt cho DFD l\u00e0 Yourdon v\u00e0 Coad, v\u00e0 Gane v\u00e0 Sarson. C\u1ea3 hai \u0111\u1ec1u s\u1eed d\u1ee5ng h\u00ecnh vu\u00f4ng cho c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, m\u0169i t\u00ean cho lu\u1ed3ng d\u1eef li\u1ec7u, v\u00e0 h\u00ecnh ch\u1eef nh\u1eadt (ho\u1eb7c h\u00ecnh thoi) cho kho d\u1eef li\u1ec7u. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh n\u1eb1m \u1edf c\u00e1ch bi\u1ec3u di\u1ec5n c\u00e1c qu\u00e1 tr\u00ecnh. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i: C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i l\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i giao ti\u1ebfp tr\u1ef1c ti\u1ebfp v\u1edbi h\u1ec7 th\u1ed1ng \u0111ang \u0111\u01b0\u1ee3c xem x\u00e9t. Ch\u00fang l\u00e0 ngu\u1ed3n ch\u00ednh c\u1ee7a d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra, \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf c\u00e1c m\u00e9p ngo\u00e0i c\u1ee7a s\u01a1 \u0111\u1ed3. Qu\u00e1 tr\u00ecnh: C\u00e1c qu\u00e1 tr\u00ecnh l\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp thay \u0111\u1ed5i d\u1eef li\u1ec7u. C\u00e1c nh\u00e3n \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o m\u1ed7i qu\u00e1 tr\u00ecnh \u0111\u1ec3 m\u00f4 t\u1ea3 h\u00e0nh \u0111\u1ed9ng \u0111ang di\u1ec5n ra, c\u00f3 th\u1ec3 l\u00e0 c\u00e1c ph\u00e9p t\u00ednh, s\u1eafp x\u1ebfp d\u1eef li\u1ec7u ho\u1eb7c \u00e1p d\u1ee5ng c\u00e1c quy t\u1eafc kinh doanh c\u1ee5 th\u1ec3. Kho d\u1eef li\u1ec7u: Kho d\u1eef li\u1ec7u l\u00e0 c\u00e1c t\u1ec7p ho\u1eb7c khu v\u1ef1c l\u01b0u tr\u1eef ch\u1ee9a th\u00f4ng tin c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy xu\u1ea5t sau n\u00e0y. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c b\u1ea3ng t\u00ednh v\u1edbi c\u00e1c nh\u00e3n gi\u1ea3i th\u00edch m\u1ee5c \u0111\u00edch c\u1ee7a ch\u00fang. Lu\u1ed3ng d\u1eef li\u1ec7u: C\u00e1c \u0111\u01b0\u1eddng c\u00f3 m\u0169i t\u00ean bi\u1ec3u di\u1ec5n lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, qu\u00e1 tr\u00ecnh v\u00e0 kho d\u1eef li\u1ec7u. Nh\u1eefng \u0111\u01b0\u1eddng n\u00e0y, \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n, k\u1ebft n\u1ed1i t\u1ea5t c\u1ea3 th\u00f4ng tin l\u1ea1i v\u1edbi nhau. Hi\u1ec3u v\u1ec1 DFD \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi kh\u00f4ng quen thu\u1ed9c v\u1edbi l\u1eadp tr\u00ecnh ho\u1eb7c k\u1ef9 thu\u1eadt, DFD c\u00f3 th\u1ec3 tr\u00f4ng ph\u1ee9c t\u1ea1p. Tuy nhi\u00ean, v\u1ec1 b\u1ea3n ch\u1ea5t, ch\u00fang gi\u1ea3i th\u00edch \u0111i\u1ec1u g\u00ec x\u1ea3y ra v\u1edbi d\u1eef li\u1ec7u khi th\u1ef1c hi\u1ec7n m\u1ed9t h\u00e0nh \u0111\u1ed9ng c\u1ee5 th\u1ec3 \u2014 t\u1eeb \u0111\u1ea7u v\u00e0o \u0111\u1ebfn \u0111\u1ea7u ra. C\u00e1c DFD \u0111\u01a1n gi\u1ea3n th\u01b0\u1eddng c\u00f3 m\u00e0u \u0111\u01a1n s\u1eafc, trong khi c\u00e1c s\u01a1 \u0111\u1ed3 ph\u1ee9c t\u1ea1p h\u01a1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nhi\u1ec1u m\u00e0u s\u1eafc \u0111\u1ec3 bi\u1ec3u di\u1ec5n c\u00e1c bi\u1ebfn kh\u00e1c nhau. Quy t\u1eafc DFD \u0110\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 c\u00f3 \u00fd ngh\u0129a, h\u00e3y tu\u00e2n theo c\u00e1c quy t\u1eafc sau: M\u1ed7i qu\u00e1 tr\u00ecnh v\u00e0 kho d\u1eef li\u1ec7u ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t m\u1ed9t \u0111\u1ea7u v\u00e0o v\u00e0 m\u1ed9t \u0111\u1ea7u ra. C\u00e1c kho d\u1eef li\u1ec7u ph\u1ea3i \u0111i qua m\u1ed9t qu\u00e1 tr\u00ecnh. M\u1ed7i qu\u00e1 tr\u00ecnh trong DFD ph\u1ea3i k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t qu\u00e1 tr\u00ecnh kh\u00e1c ho\u1eb7c m\u1ed9t \u0111i\u1ec3m ki\u1ec3m tra nh\u01b0 m\u1ed9t kho d\u1eef li\u1ec7u. T\u1ea1o m\u1ed9t S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u M\u1eb7c d\u00f9 m\u1ed9t s\u1ed1 k\u1ef9 s\u01b0 th\u00edch ph\u01b0\u01a1ng ph\u00e1p v\u1ebd tay truy\u1ec1n th\u1ed1ng, c\u00e1c gi\u1ea3i ph\u00e1p ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i cung c\u1ea5p c\u00e1ch ti\u1ebfp c\u1eadn hi\u1ec7u qu\u1ea3 h\u01a1n.Visual Paradigm n\u1ed5i b\u1eadt nh\u01b0 m\u1ed9t l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u cho nh\u1eefng ng\u01b0\u1eddi nghi\u00eam t\u00fac \u0111\u00e1nh gi\u00e1 c\u00e1c gi\u1ea3i ph\u00e1p DFD. K\u1ebft lu\u1eadn: Trong b\u1ed1i c\u1ea3nh d\u1ef1a tr\u00ean d\u1eef li\u1ec7u, th\u00e0nh th\u1ea1o ngh\u1ec7 thu\u1eadt tr\u1ef1c quan h\u00f3a lu\u1ed3ng th\u00f4ng tin l\u00e0 m\u1ed9t k\u1ef9 n\u0103ng m\u1ea1nh m\u1ebd.S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u, v\u1edbi s\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 r\u00f5 r\u00e0ng c\u1ee7a ch\u00fang, \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 v\u00f4 gi\u00e1 trong vi\u1ec7c thi\u1ebft k\u1ebf, ph\u00e2n t\u00edch v\u00e0 t\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng. H\u00e3y \u0111\u00f3n nh\u1eadn th\u1ebf gi\u1edbi c\u1ee7a DFD, v\u00e0 b\u1ea1n s\u1ebd t\u1ef1 tin v\u00e0 ch\u00ednh x\u00e1c khi l\u01b0\u1edbt qua \u0111\u1ea1i d\u01b0\u01a1ng d\u1eef li\u1ec7u. V\u00ed d\u1ee5 v\u1ec1 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin. Trong ph\u1ea7n n\u00e0y, ch\u00fang t\u00f4i \u0111\u00e3 s\u01b0u t\u1ea7m m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 DFD \u0111\u1ec3 b\u1ea1n tham kh\u1ea3o. B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 DFD c\u1ee7a ri\u00eang m\u00ecnh tr\u1ef1c tuy\u1ebfn b\u1eb1ng nh\u1eefng v\u00ed d\u1ee5 n\u00e0y, s\u1eed d\u1ee5ng Visual Paradigm Online. \u00a0 S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cho \u1ee9ng d\u1ee5ng si\u00eau th\u1ecb: (Ch\u1ec9nh s\u1eeda s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u n\u00e0yv\u1edbi c\u00f4ng c\u1ee5 t\u1ea1o s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ee7a Visual Paradigm Online.) 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D\u00f9 b\u1ea1n \u0111ang kh\u00e1m ph\u00e1 s\u00e2u s\u1eafc v\u1ec1 Internet, t\u1ed1i \u01b0u h\u00f3a c\u00e1c chi\u1ebfn l\u01b0\u1ee3c ti\u1ebfp th\u1ecb hay gi\u1ea3i m\u00e3 h\u00e0nh vi kh\u00e1ch h\u00e0ng, then ch\u1ed1t n\u1eb1m \u1edf vi\u1ec7c t\u1ed5 ch\u1ee9c lu\u1ed3ng d\u1eef li\u1ec7u. M\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD). \u0110\u1eebng lo l\u1eafng, n\u00f3 kh\u00f4ng ph\u1ee9c t\u1ea1p nh\u01b0 nghe c\u00f3 v\u1ebb. S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD) l\u00e0 g\u00ec? S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u l\u00e0 m\u1ed9t bi\u1ec3u di\u1ec5n tr\u1ef1c quan m\u00f4 t\u1ea3 \u0111\u1ea7u v\u00e0o, qu\u00e1 tr\u00ecnh v\u00e0 \u0111\u1ea7u ra c\u1ee7a d\u1eef li\u1ec7u trong m\u1ed9t h\u1ec7 th\u1ed1ng. Lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c minh h\u1ecda b\u1eb1ng c\u00e1c \u0111\u01b0\u1eddng v\u00e0 m\u0169i t\u00ean, trong khi k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng c\u00e1c h\u00ecnh d\u1ea1ng nh\u01b0 h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 h\u00ecnh elip. S\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn logic v\u00e0 c\u00f3 t\u1ed5 ch\u1ee9c v\u1ec1 c\u00e1ch d\u1eef li\u1ec7u di chuy\u1ec3n qua h\u1ec7 th\u1ed1ng, gi\u00fap c\u00e1c qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u h\u01a1n. T\u1ea1o m\u1ed9t s\u01a1 \u0111\u1ed3 DFD S\u01a1 \u0111\u1ed3 DFD c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c v\u1ebd tay ho\u1eb7c t\u1ea1o b\u1eb1ng ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng m\u1edbi ho\u1eb7c \u0111\u00e1nh gi\u00e1 c\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n c\u00f3. S\u1ef1 \u0111\u01a1n gi\u1ea3n c\u1ee7a DFD gi\u00fap giao ti\u1ebfp d\u1ec5 d\u00e0ng h\u01a1n v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p m\u00e0 vi\u1ec7c gi\u1ea3i th\u00edch b\u1eb1ng l\u1eddi n\u00f3i c\u00f3 th\u1ec3 g\u1eb7p kh\u00f3 kh\u0103n. S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh Khi c\u1ea7n kh\u00e1m ph\u00e1 s\u00e2u h\u01a1n v\u1ec1 m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ee5 th\u1ec3, ng\u01b0\u1eddi ta s\u1ebd s\u1eed d\u1ee5ng S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 S\u01a1 \u0111\u1ed3 DFD c\u1ea5p \u0111\u1ed9 b\u1ed1i c\u1ea3nh. S\u01a1 \u0111\u1ed3 n\u00e0y cung c\u1ea5p chi ti\u1ebft h\u01a1n v\u1ec1 m\u1ed9t qu\u00e1 tr\u00ecnh duy nh\u1ea5t v\u00e0 minh h\u1ecda m\u1ed1i li\u00ean h\u1ec7 c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i nh\u01b0 kho d\u1eef li\u1ec7u v\u00e0 t\u1ed5 ch\u1ee9c. C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u Hai k\u00fd hi\u1ec7u n\u1ed5i b\u1eadt cho DFD l\u00e0 Yourdon v\u00e0 Coad, v\u00e0 Gane v\u00e0 Sarson. C\u1ea3 hai \u0111\u1ec1u s\u1eed d\u1ee5ng h\u00ecnh vu\u00f4ng cho c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, m\u0169i t\u00ean cho lu\u1ed3ng d\u1eef li\u1ec7u, v\u00e0 h\u00ecnh ch\u1eef nh\u1eadt (ho\u1eb7c h\u00ecnh thoi) cho kho d\u1eef li\u1ec7u. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh n\u1eb1m \u1edf c\u00e1ch bi\u1ec3u di\u1ec5n c\u00e1c qu\u00e1 tr\u00ecnh. C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i: C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i l\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i giao ti\u1ebfp tr\u1ef1c ti\u1ebfp v\u1edbi h\u1ec7 th\u1ed1ng \u0111ang \u0111\u01b0\u1ee3c xem x\u00e9t. Ch\u00fang l\u00e0 ngu\u1ed3n ch\u00ednh c\u1ee7a d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra, \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf c\u00e1c m\u00e9p ngo\u00e0i c\u1ee7a s\u01a1 \u0111\u1ed3. Qu\u00e1 tr\u00ecnh: C\u00e1c qu\u00e1 tr\u00ecnh l\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp thay \u0111\u1ed5i d\u1eef li\u1ec7u. C\u00e1c nh\u00e3n \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o m\u1ed7i qu\u00e1 tr\u00ecnh \u0111\u1ec3 m\u00f4 t\u1ea3 h\u00e0nh \u0111\u1ed9ng \u0111ang di\u1ec5n ra, c\u00f3 th\u1ec3 l\u00e0 c\u00e1c ph\u00e9p t\u00ednh, s\u1eafp x\u1ebfp d\u1eef li\u1ec7u ho\u1eb7c \u00e1p d\u1ee5ng c\u00e1c quy t\u1eafc kinh doanh c\u1ee5 th\u1ec3. Kho d\u1eef li\u1ec7u: Kho d\u1eef li\u1ec7u l\u00e0 c\u00e1c t\u1ec7p ho\u1eb7c khu v\u1ef1c l\u01b0u tr\u1eef ch\u1ee9a th\u00f4ng tin c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy xu\u1ea5t sau n\u00e0y. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c b\u1ea3ng t\u00ednh v\u1edbi c\u00e1c nh\u00e3n gi\u1ea3i th\u00edch m\u1ee5c \u0111\u00edch c\u1ee7a ch\u00fang. Lu\u1ed3ng d\u1eef li\u1ec7u: C\u00e1c \u0111\u01b0\u1eddng c\u00f3 m\u0169i t\u00ean bi\u1ec3u di\u1ec5n lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, qu\u00e1 tr\u00ecnh v\u00e0 kho d\u1eef li\u1ec7u. Nh\u1eefng \u0111\u01b0\u1eddng n\u00e0y, \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n, k\u1ebft n\u1ed1i t\u1ea5t c\u1ea3 th\u00f4ng tin l\u1ea1i v\u1edbi nhau. Hi\u1ec3u v\u1ec1 DFD \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi kh\u00f4ng quen thu\u1ed9c v\u1edbi l\u1eadp tr\u00ecnh ho\u1eb7c k\u1ef9 thu\u1eadt, DFD c\u00f3 th\u1ec3 tr\u00f4ng ph\u1ee9c t\u1ea1p. Tuy nhi\u00ean, v\u1ec1 b\u1ea3n ch\u1ea5t, ch\u00fang gi\u1ea3i th\u00edch \u0111i\u1ec1u g\u00ec x\u1ea3y ra v\u1edbi d\u1eef li\u1ec7u khi th\u1ef1c hi\u1ec7n m\u1ed9t h\u00e0nh \u0111\u1ed9ng c\u1ee5 th\u1ec3 \u2014 t\u1eeb \u0111\u1ea7u v\u00e0o \u0111\u1ebfn \u0111\u1ea7u ra. C\u00e1c DFD \u0111\u01a1n gi\u1ea3n th\u01b0\u1eddng c\u00f3 m\u00e0u \u0111\u01a1n s\u1eafc, trong khi c\u00e1c s\u01a1 \u0111\u1ed3 ph\u1ee9c t\u1ea1p h\u01a1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nhi\u1ec1u m\u00e0u s\u1eafc \u0111\u1ec3 bi\u1ec3u di\u1ec5n c\u00e1c bi\u1ebfn kh\u00e1c nhau. Quy t\u1eafc DFD \u0110\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 c\u00f3 \u00fd ngh\u0129a, h\u00e3y tu\u00e2n theo c\u00e1c quy t\u1eafc sau: M\u1ed7i qu\u00e1 tr\u00ecnh v\u00e0 kho d\u1eef li\u1ec7u ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t m\u1ed9t \u0111\u1ea7u v\u00e0o v\u00e0 m\u1ed9t \u0111\u1ea7u ra. C\u00e1c kho d\u1eef li\u1ec7u ph\u1ea3i \u0111i qua m\u1ed9t qu\u00e1 tr\u00ecnh. M\u1ed7i qu\u00e1 tr\u00ecnh trong DFD ph\u1ea3i k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t qu\u00e1 tr\u00ecnh kh\u00e1c ho\u1eb7c m\u1ed9t \u0111i\u1ec3m ki\u1ec3m tra nh\u01b0 m\u1ed9t kho d\u1eef li\u1ec7u. T\u1ea1o m\u1ed9t S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u M\u1eb7c d\u00f9 m\u1ed9t s\u1ed1 k\u1ef9 s\u01b0 th\u00edch ph\u01b0\u01a1ng ph\u00e1p v\u1ebd tay truy\u1ec1n th\u1ed1ng, c\u00e1c gi\u1ea3i ph\u00e1p ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i cung c\u1ea5p c\u00e1ch ti\u1ebfp c\u1eadn hi\u1ec7u qu\u1ea3 h\u01a1n.Visual Paradigm n\u1ed5i b\u1eadt nh\u01b0 m\u1ed9t l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u cho nh\u1eefng ng\u01b0\u1eddi nghi\u00eam t\u00fac \u0111\u00e1nh gi\u00e1 c\u00e1c gi\u1ea3i ph\u00e1p DFD. K\u1ebft lu\u1eadn: Trong b\u1ed1i c\u1ea3nh d\u1ef1a tr\u00ean d\u1eef li\u1ec7u, th\u00e0nh th\u1ea1o ngh\u1ec7 thu\u1eadt tr\u1ef1c quan h\u00f3a lu\u1ed3ng th\u00f4ng tin l\u00e0 m\u1ed9t k\u1ef9 n\u0103ng m\u1ea1nh m\u1ebd.S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u, v\u1edbi s\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 r\u00f5 r\u00e0ng c\u1ee7a ch\u00fang, \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 v\u00f4 gi\u00e1 trong vi\u1ec7c thi\u1ebft k\u1ebf, ph\u00e2n t\u00edch v\u00e0 t\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng. H\u00e3y \u0111\u00f3n nh\u1eadn th\u1ebf gi\u1edbi c\u1ee7a DFD, v\u00e0 b\u1ea1n s\u1ebd t\u1ef1 tin v\u00e0 ch\u00ednh x\u00e1c khi l\u01b0\u1edbt qua \u0111\u1ea1i d\u01b0\u01a1ng d\u1eef li\u1ec7u. V\u00ed d\u1ee5 v\u1ec1 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin. Trong ph\u1ea7n n\u00e0y, ch\u00fang t\u00f4i \u0111\u00e3 s\u01b0u t\u1ea7m m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 DFD \u0111\u1ec3 b\u1ea1n tham kh\u1ea3o. B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 DFD c\u1ee7a ri\u00eang m\u00ecnh tr\u1ef1c tuy\u1ebfn b\u1eb1ng nh\u1eefng v\u00ed d\u1ee5 n\u00e0y, s\u1eed d\u1ee5ng Visual Paradigm Online. \u00a0 S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cho \u1ee9ng d\u1ee5ng si\u00eau th\u1ecb: (Ch\u1ec9nh s\u1eeda s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u n\u00e0yv\u1edbi c\u00f4ng c\u1ee5 t\u1ea1o s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u c\u1ee7a Visual Paradigm Online.) V\u00ed d\u1ee5 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u: H\u1ec7 th\u1ed1ng \u0111\u1eb7t m\u00f3n \u0103n\u00a0(Ch\u1ec9nh s\u1eeda s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef\u0110i\u1ec1u h\u01b0\u1edbng Th\u00e0nh c\u00f4ng: H\u01b0\u1edbng d\u1eabn v\u1ec1 S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD)","og_url":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-success-a-guide-to-data-flow-diagrams-dfd\/","og_site_name":"Visual Paradigm Guides Vietnamese","article_published_time":"2026-02-04T09:46:19+00:00","og_image":[{"url":"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/10\/01-online-data-flow-diagram-software.png","type":"","width":"","height":""}],"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-success-a-guide-to-data-flow-diagrams-dfd\/#article","isPartOf":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-success-a-guide-to-data-flow-diagrams-dfd\/"},"headline":"\u0110i\u1ec1u h\u01b0\u1edbng Th\u00e0nh c\u00f4ng: H\u01b0\u1edbng d\u1eabn v\u1ec1 S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD)","datePublished":"2026-02-04T09:46:19+00:00","mainEntityOfPage":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-success-a-guide-to-data-flow-diagrams-dfd\/"},"wordCount":1684,"commentCount":0,"image":{"@id":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-success-a-guide-to-data-flow-diagrams-dfd\/#primaryimage"},"thumbnailUrl":"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/10\/01-online-data-flow-diagram-software.png","articleSection":["DFD"],"inLanguage":"vi","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/guides.visual-paradigm.com\/vn\/navigating-success-a-guide-to-data-flow-diagrams-dfd\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-success-a-guide-to-data-flow-diagrams-dfd\/","url":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-success-a-guide-to-data-flow-diagrams-dfd\/","name":"\u0110i\u1ec1u h\u01b0\u1edbng Th\u00e0nh c\u00f4ng: H\u01b0\u1edbng d\u1eabn v\u1ec1 S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD) - 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