{"id":532,"date":"2026-07-08T05:41:48","date_gmt":"2026-07-08T05:41:48","guid":{"rendered":"https:\/\/www.go-togaf.com\/vn\/%f0%9f%93%98-the-ultimate-guide-to-data-flow-diagrams-dfd-concepts-rules-and-graphviz-examples\/"},"modified":"2026-07-08T05:41:48","modified_gmt":"2026-07-08T05:41:48","slug":"%f0%9f%93%98-the-ultimate-guide-to-data-flow-diagrams-dfd-concepts-rules-and-graphviz-examples","status":"publish","type":"post","link":"https:\/\/www.go-togaf.com\/vn\/%f0%9f%93%98-the-ultimate-guide-to-data-flow-diagrams-dfd-concepts-rules-and-graphviz-examples\/","title":{"rendered":"\ud83d\udcd8 H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD): Kh\u00e1i ni\u1ec7m, quy t\u1eafc v\u00e0 v\u00ed d\u1ee5 Graphviz"},"content":{"rendered":"

\ud83c\udf1f Gi\u1edbi thi\u1ec7u<\/h2>\n

Trong b\u1ed1i c\u1ea3nh ph\u1ee9c t\u1ea1p c\u1ee7a k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m v\u00e0 ph\u00e2n t\u00edch kinh doanh hi\u1ec7n \u0111\u1ea1i, vi\u1ec7c thu h\u1eb9p kho\u1ea3ng c\u00e1ch giao ti\u1ebfp gi\u1eefa c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n k\u1ef9 thu\u1eadt v\u00e0 c\u00e1c b\u00ean li\u00ean quan kh\u00f4ng chuy\u00ean l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c li\u00ean t\u1ee5c. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD)<\/strong>\u2014m\u1ed9t c\u00f4ng c\u1ee5 m\u00f4 h\u00ecnh h\u00f3a tr\u1ef1c quan m\u1ea1nh m\u1ebd v\u00e0 v\u01b0\u1ee3t th\u1eddi gian, gi\u00fap \u00e1nh x\u1ea1 h\u00e0nh tr\u00ecnh c\u1ee7a d\u1eef li\u1ec7u qua m\u1ed9t h\u1ec7 th\u1ed1ng.<\/p>\n

Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 lu\u1ed3ng t\u1eadp trung v\u00e0o lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 c\u00e1c v\u00f2ng l\u1eb7p logic, DFD t\u1eadp trung nghi\u00eam ng\u1eb7t v\u00e0o d\u1eef li\u1ec7u<\/strong>: ngu\u1ed3n g\u1ed1c c\u1ee7a n\u00f3, c\u00e1ch n\u00f3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i, n\u01a1i n\u00f3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 cu\u1ed1i c\u00f9ng n\u00f3 \u0111i \u0111\u00e2u. D\u00f9 b\u1ea1n \u0111ang thi\u1ebft k\u1ebf m\u1ed9t n\u1ec1n t\u1ea3ng th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed quy m\u00f4 l\u1edbn hay m\u1ed9t b\u1ed9 theo d\u00f5i t\u1ed3n kho n\u1ed9i b\u1ed9 \u0111\u01a1n gi\u1ea3n, DFD \u0111\u1ec1u cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan v\u1ec1 ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n.<\/p>\n

\"Bi\u1ec3u<\/p>\n

\u00a0<\/p>\n

\u00a0<\/p>\n

Trong h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n n\u00e0y, ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 c\u00e1c nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i c\u1ee7a DFD, c\u00e1c quy t\u1eafc nghi\u00eam ng\u1eb7t chi ph\u1ed1i ch\u00fang, s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u00f4 h\u00ecnh logic v\u00e0 v\u1eadt l\u00fd, c\u0169ng nh\u01b0 c\u00e1ch hi\u1ec7n th\u1ef1c h\u00f3a c\u00e1c kh\u00e1i ni\u1ec7m n\u00e0y b\u1eb1ng m\u00e3 Graphviz DOT<\/strong> code. M\u1ed7i v\u00ed d\u1ee5 \u0111\u01b0\u1ee3c cung c\u1ea5p \u0111\u1ec1u bao g\u1ed3m m\u1ed9t Khung ch\u1ee9a ranh gi\u1edbi h\u1ec7 th\u1ed1ng<\/strong> \u0111\u1ec3 ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng c\u00e1c quy tr\u00ecnh n\u1ed9i b\u1ed9 c\u1ee7a h\u1ec7 th\u1ed1ng v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i.<\/p>\n\n

\ud83e\uddd0 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 (DFD) bi\u1ec3u di\u1ec5n tr\u1ef1c quan lu\u1ed3ng d\u1eef li\u1ec7u qua m\u1ed9t h\u1ec7 th\u1ed1ng th\u00f4ng tin kinh doanh. N\u00f3 \u00e1nh x\u1ea1 c\u00e1c quy tr\u00ecnh li\u00ean quan \u0111\u1ebfn vi\u1ec7c chuy\u1ec3n d\u1eef li\u1ec7u t\u1eeb ngu\u1ed3n \u0111\u1ea7u v\u00e0o \u0111\u1ebfn l\u01b0u tr\u1eef t\u1ec7p, v\u00e0 cu\u1ed1i c\u00f9ng \u0111\u1ebfn vi\u1ec7c t\u1ea1o b\u00e1o c\u00e1o v\u00e0 c\u00e1c \u0111i\u1ec3m xu\u1ea5t.<\/p>\n

DFD th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i ri\u00eang bi\u1ec7t:<\/p>\n

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  1. \n

    DFD Logic:<\/strong> M\u00f4 t\u1ea3 lu\u1ed3ng d\u1eef li\u1ec7u kinh doanh<\/em> c\u1ee7a d\u1eef li\u1ec7u. N\u00f3 t\u1eadp trung v\u00e0o nh\u1eefng g\u00ec h\u1ec7 th\u1ed1ng l\u00e0m (c\u00e1c ho\u1ea1t \u0111\u1ed9ng kinh doanh, s\u1ef1 ki\u1ec7n v\u00e0 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ea1o ra) m\u00e0 kh\u00f4ng c\u1ea7n lo l\u1eafng v\u1ec1 c\u00e1ch n\u00f3 s\u1ebd \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt.<\/p>\n<\/li>\n

  2. \n

    DFD V\u1eadt l\u00fd:<\/strong> M\u00f4 t\u1ea3 vi\u1ec7c tri\u1ec3n khai<\/em> c\u1ee7a lu\u1ed3ng logic. N\u00f3 chi ti\u1ebft h\u00f3a c\u00e1ch h\u1ec7 th\u1ed1ng s\u1ebd th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng, bao g\u1ed3m ph\u1ea7n c\u1ee9ng c\u1ee5 th\u1ec3, ph\u1ea7n m\u1ec1m, t\u1ec7p c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 c\u00e1c can thi\u1ec7p th\u1ee7 c\u00f4ng c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n<\/li>\n<\/ol>\n

    \ud83c\udfaf T\u1ea1i sao s\u1eed d\u1ee5ng DFD?<\/h3>\n

    DFD \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 giao ti\u1ebfp xu\u1ea5t s\u1eafc gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 nh\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng nh\u1edd t\u00ednh tr\u1ef1c quan \u0111\u01a1n gi\u1ea3n c\u1ee7a ch\u00fang. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3:<\/p>\n