{"id":73,"date":"2026-04-10T07:13:28","date_gmt":"2026-04-10T07:13:28","guid":{"rendered":"https:\/\/www.hi-posts.com\/vn\/object-oriented-analysis-design-essentials\/"},"modified":"2026-04-10T07:13:28","modified_gmt":"2026-04-10T07:13:28","slug":"object-oriented-analysis-design-essentials","status":"publish","type":"post","link":"https:\/\/www.hi-posts.com\/vn\/object-oriented-analysis-design-essentials\/","title":{"rendered":"C\u00e1c y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu c\u1ee7a Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng: X\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc cho b\u1ea5t k\u1ef3 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh n\u00e0o"},"content":{"rendered":"<p>Trong b\u1ed1i c\u1ea3nh r\u1ed9ng l\u1edbn c\u1ee7a k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m, \u00edt kh\u00e1i ni\u1ec7m n\u00e0o c\u00f3 t\u00ednh n\u1ec1n t\u1ea3ng b\u1eb1ng Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOAD). D\u00f9 b\u1ea1n \u0111ang x\u00e2y d\u1ef1ng m\u1ed9t c\u00f4ng c\u1ee5 nh\u1ecf hay m\u1ed9t n\u1ec1n t\u1ea3ng c\u1ea5p doanh nghi\u1ec7p, c\u00e1ch b\u1ea1n t\u1ed5 ch\u1ee9c d\u1eef li\u1ec7u v\u00e0 logic s\u1ebd quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec c\u1ee7a h\u1ec7 th\u1ed1ng. H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c c\u01a1 ch\u1ebf c\u1ed1t l\u00f5i c\u1ee7a OOAD, cung c\u1ea5p con \u0111\u01b0\u1eddng r\u00f5 r\u00e0ng \u0111\u1ec3 hi\u1ec3u c\u00e1ch c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c, c\u00e1ch ph\u00e2n b\u1ed5 tr\u00e1ch nhi\u1ec7m, v\u00e0 c\u00e1ch x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 th\u00edch nghi v\u1edbi thay \u0111\u1ed5i m\u00e0 kh\u00f4ng s\u1ee5p \u0111\u1ed5.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Hand-drawn infographic illustrating Object-Oriented Analysis and Design (OOAD) essentials including the four core pillars (encapsulation, abstraction, inheritance, polymorphism), analysis vs design phases comparison, SOLID design principles, and common pitfalls to avoid for building maintainable software systems\" decoding=\"async\" src=\"https:\/\/www.hi-posts.com\/wp-content\/uploads\/2026\/04\/ooad-essentials-infographic-hand-drawn-16x9-1.jpg\"\/><\/figure>\n<\/div>\n<h2>T\u1ea1i sao OOAD l\u1ea1i quan tr\u1ecdng \ud83e\udde0<\/h2>\n<p>L\u1eadp tr\u00ecnh th\u1ee7 t\u1ee5c truy\u1ec1n th\u1ed1ng t\u1eadp trung v\u00e0o c\u00e1c h\u00e0m v\u00e0 h\u00e0nh \u0111\u1ed9ng. M\u1eb7c d\u00f9 hi\u1ec7u qu\u1ea3 v\u1edbi c\u00e1c \u0111o\u1ea1n m\u00e3 \u0111\u01a1n gi\u1ea3n, n\u00f3 th\u01b0\u1eddng g\u1eb7p kh\u00f3 kh\u0103n v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ee9c t\u1ea1p, quy m\u00f4 l\u1edbn. OOAD chuy\u1ec3n tr\u1ecdng t\u00e2m sang<strong>c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng<\/strong>. M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng k\u1ebft h\u1ee3p d\u1eef li\u1ec7u v\u00e0 h\u00e0nh vi l\u1ea1i v\u1edbi nhau, m\u00f4 ph\u1ecfng c\u00e1c th\u1ef1c th\u1ec3 trong th\u1ebf gi\u1edbi th\u1ef1c. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y mang l\u1ea1i nhi\u1ec1u l\u1ee3i th\u1ebf r\u00f5 r\u1ec7t:<\/p>\n<ul>\n<li><strong>T\u00ednh module:<\/strong>C\u00e1c h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c chia nh\u1ecf th\u00e0nh c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ed9c l\u1eadp, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0 ki\u1ec3m th\u1eed ri\u00eang bi\u1ec7t.<\/li>\n<li><strong>T\u00ednh t\u00e1i s\u1eed d\u1ee5ng:<\/strong>M\u1ed9t khi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u00fang c\u00e1ch, n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf nhi\u1ec1u ph\u1ea7n kh\u00e1c nhau c\u1ee7a \u1ee9ng d\u1ee5ng ho\u1eb7c th\u1eadm ch\u00ed trong c\u00e1c d\u1ef1 \u00e1n ho\u00e0n to\u00e0n kh\u00e1c nhau.<\/li>\n<li><strong>T\u00ednh d\u1ec5 b\u1ea3o tr\u00ec:<\/strong>Nh\u1eefng thay \u0111\u1ed5i \u1edf m\u1ed9t khu v\u1ef1c c\u1ee7a h\u1ec7 th\u1ed1ng \u00edt c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m h\u1ecfng ch\u1ee9c n\u0103ng \u1edf n\u01a1i kh\u00e1c, gi\u1ea3m thi\u1ec3u r\u1ee7i ro l\u1ed7i tr\u1edf l\u1ea1i.<\/li>\n<li><strong>T\u00ednh m\u1edf r\u1ed9ng:<\/strong>C\u00e1c t\u00ednh n\u0103ng m\u1edbi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o b\u1eb1ng c\u00e1ch gi\u1edbi thi\u1ec7u c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng m\u1edbi thay v\u00ec vi\u1ebft l\u1ea1i c\u00e1c kh\u1ed1i m\u00e3 hi\u1ec7n c\u00f3.<\/li>\n<\/ul>\n<p>B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc OOAD, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng d\u1ec5 hi\u1ec3u h\u01a1n. Khi m\u1ed9t th\u00e0nh vi\u00ean m\u1edbi tham gia d\u1ef1 \u00e1n, h\u1ecd c\u00f3 th\u1ec3 theo d\u00f5i lu\u1ed3ng d\u1eef li\u1ec7u qua c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng thay v\u00ec ph\u1ea3i gi\u1ea3i m\u00e3 m\u1ed9t m\u1ea1ng l\u01b0\u1edbi r\u1ed1i r\u1eafm c\u00e1c bi\u1ebfn to\u00e0n c\u1ee5c v\u00e0 l\u1eddi g\u1ecdi h\u00e0m.<\/p>\n<h2>C\u00e1c tr\u1ee5 c\u1ed9t c\u1ed1t l\u00f5i c\u1ee7a H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83d\udd11<\/h2>\n<p>Tr\u01b0\u1edbc khi b\u01b0\u1edbc v\u00e0o c\u00e1c giai \u0111o\u1ea1n ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u r\u00f5 b\u1ed1n tr\u1ee5 c\u1ed9t n\u1ec1n t\u1ea3ng h\u1ed7 tr\u1ee3 m\u00f4 h\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. Nh\u1eefng kh\u00e1i ni\u1ec7m n\u00e0y quy \u0111\u1ecbnh c\u00e1ch b\u1ea1n m\u00f4 h\u00ecnh h\u00f3a gi\u1ea3i ph\u00e1p c\u1ee7a m\u00ecnh.<\/p>\n<h3>1. Bao \u0111\u00f3ng \ud83d\udd12<\/h3>\n<p>Bao \u0111\u00f3ng l\u00e0 vi\u1ec7c h\u1ea1n ch\u1ebf truy c\u1eadp tr\u1ef1c ti\u1ebfp v\u00e0o m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 bao g\u1ed3m vi\u1ec7c gom d\u1eef li\u1ec7u (thu\u1ed9c t\u00ednh) v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c (h\u00e0m) ho\u1ea1t \u0111\u1ed9ng tr\u00ean d\u1eef li\u1ec7u th\u00e0nh m\u1ed9t \u0111\u01a1n v\u1ecb duy nh\u1ea5t. \u0110i\u1ec1u n\u00e0y b\u1ea3o v\u1ec7 tr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9 c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng kh\u1ecfi s\u1ef1 can thi\u1ec7p kh\u00f4ng mong mu\u1ed1n.<\/p>\n<ul>\n<li><strong>C\u00e1c b\u1ed9 ch\u1ecdn t\u00ednh hi\u1ec3n th\u1ecb:<\/strong>S\u1eed d\u1ee5ng c\u00e1c m\u1ee9c truy c\u1eadp c\u00f4ng khai, ri\u00eang t\u01b0 v\u00e0 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 \u0111\u1ec3 ki\u1ec3m so\u00e1t \u0111i\u1ec1u g\u00ec c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y b\u00ean ngo\u00e0i l\u1edbp.<\/li>\n<li><strong>C\u00e1c ph\u01b0\u01a1ng th\u1ee9c l\u1ea5y v\u00e0 thi\u1ebft l\u1eadp:<\/strong>Cung c\u1ea5p c\u00e1c c\u00e1ch ki\u1ec3m so\u00e1t \u0111\u1ec3 \u0111\u1ecdc v\u00e0 thay \u0111\u1ed5i d\u1eef li\u1ec7u n\u1ed9i b\u1ed9.<\/li>\n<li><strong>\u1ea8n d\u1eef li\u1ec7u:<\/strong>Ng\u0103n c\u1ea3n m\u00e3 b\u00ean ngo\u00e0i d\u1ef1a v\u00e0o chi ti\u1ebft tri\u1ec3n khai n\u1ed9i b\u1ed9.<\/li>\n<\/ul>\n<h3>2. Tr\u1eebu t\u01b0\u1ee3ng \ud83e\udde9<\/h3>\n<p>Tr\u1eebu t\u01b0\u1ee3ng bao g\u1ed3m vi\u1ec7c che gi\u1ea5u c\u00e1c chi ti\u1ebft tri\u1ec3n khai ph\u1ee9c t\u1ea1p v\u00e0 ch\u1ec9 hi\u1ec3n th\u1ecb c\u00e1c t\u00ednh n\u0103ng c\u1ea7n thi\u1ebft c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 gi\u00fap c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1eadp trung v\u00e0o<em>\u0111i\u1ec1u g\u00ec<\/em>m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0m g\u00ec thay v\u00ec<em>c\u00e1ch th\u1ee9c<\/em> n\u00f3 l\u00e0m v\u1eady.<\/p>\n<ul>\n<li><strong>L\u1edbp tr\u1eebu t\u01b0\u1ee3ng:<\/strong> X\u00e1c \u0111\u1ecbnh b\u1ea3n v\u1ebd ph\u00e1c th\u1ea3o cho c\u00e1c l\u1edbp kh\u00e1c m\u00e0 kh\u00f4ng cung c\u1ea5p tri\u1ec3n khai \u0111\u1ea7y \u0111\u1ee7.<\/li>\n<li><strong>Giao di\u1ec7n:<\/strong> X\u00e1c \u0111\u1ecbnh m\u1ed9t h\u1ee3p \u0111\u1ed3ng m\u00e0 c\u00e1c l\u1edbp tri\u1ec3n khai ph\u1ea3i tu\u00e2n theo.<\/li>\n<li><strong>\u0110\u01a1n gi\u1ea3n h\u00f3a:<\/strong> Gi\u1ea3m \u0111\u1ed9 ph\u1ee9c t\u1ea1p b\u1eb1ng c\u00e1ch l\u1ecdc b\u1ecf th\u00f4ng tin kh\u00f4ng c\u1ea7n thi\u1ebft.<\/li>\n<\/ul>\n<h3>3. K\u1ebf th\u1eeba \ud83c\udf33<\/h3>\n<p>K\u1ebf th\u1eeba cho ph\u00e9p m\u1ed9t l\u1edbp m\u1edbi ti\u1ebfp nh\u1eadn c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi c\u1ee7a m\u1ed9t l\u1edbp hi\u1ec7n c\u00f3. \u0110i\u1ec1u n\u00e0y th\u00fac \u0111\u1ea9y vi\u1ec7c t\u00e1i s\u1eed d\u1ee5ng m\u00e3 v\u00e0 thi\u1ebft l\u1eadp m\u1ed1i quan h\u1ec7 ph\u00e2n c\u1ea5p gi\u1eefa c\u00e1c l\u1edbp.<\/p>\n<ul>\n<li><strong>L\u1edbp cha\/L\u1edbp si\u00eau:<\/strong> L\u1edbp \u0111ang \u0111\u01b0\u1ee3c k\u1ebf th\u1eeba.<\/li>\n<li><strong>L\u1edbp con\/L\u1edbp con:<\/strong> L\u1edbp k\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c.<\/li>\n<li><strong>Ghi \u0111\u00e8:<\/strong> Kh\u1ea3 n\u0103ng \u0111\u1ecbnh ngh\u0129a l\u1ea1i m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c trong l\u1edbp con \u0111\u1ec3 cung c\u1ea5p h\u00e0nh vi c\u1ee5 th\u1ec3.<\/li>\n<\/ul>\n<h3>4. \u0110a h\u00ecnh \ud83c\udfad<\/h3>\n<p>\u0110a h\u00ecnh cho ph\u00e9p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 th\u1ec3 ch\u00fang l\u00e0 th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp cha thay v\u00ec l\u1edbp th\u1ef1c s\u1ef1 c\u1ee7a ch\u00fang. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p m\u1ed9t giao di\u1ec7n duy nh\u1ea5t bi\u1ec3u di\u1ec5n c\u00e1c d\u1ea1ng c\u01a1 s\u1edf kh\u00e1c nhau (ki\u1ec3u d\u1eef li\u1ec7u).<\/p>\n<ul>\n<li><strong>\u0110a h\u00ecnh th\u1eddi gian ch\u1ea1y:<\/strong> Ghi \u0111\u00e8 ph\u01b0\u01a1ng th\u1ee9c n\u01a1i ph\u01b0\u01a1ng th\u1ee9c c\u1ea7n th\u1ef1c thi \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y.<\/li>\n<li><strong>\u0110a h\u00ecnh th\u1eddi gian bi\u00ean d\u1ecbch:<\/strong> Ghi \u0111\u00e8 ph\u01b0\u01a1ng th\u1ee9c n\u01a1i nhi\u1ec1u ph\u01b0\u01a1ng th\u1ee9c chia s\u1ebb c\u00f9ng t\u00ean nh\u01b0ng kh\u00e1c nhau v\u1ec1 tham s\u1ed1.<\/li>\n<li><strong>T\u00ednh linh ho\u1ea1t:<\/strong> L\u00e0m cho m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean linh ho\u1ea1t v\u00e0 d\u1ec5 m\u1edf r\u1ed9ng h\u01a1n.<\/li>\n<\/ul>\n<h2>Giai \u0111o\u1ea1n ph\u00e2n t\u00edch: Hi\u1ec3u y\u00eau c\u1ea7u \ud83d\udccb<\/h2>\n<p>Ph\u00e2n t\u00edch l\u00e0 giai \u0111o\u1ea1n m\u00e0 b\u1ea1n x\u00e1c \u0111\u1ecbnh<em>\u0111i\u1ec1u g\u00ec<\/em> h\u1ec7 th\u1ed1ng c\u1ea7n th\u1ef1c hi\u1ec7n. N\u00f3 \u0111\u1ed9c l\u1eadp v\u1edbi chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. M\u1ee5c ti\u00eau l\u00e0 hi\u1ec3u l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1 v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 v\u00e0 h\u00e0nh vi ch\u00ednh c\u1ea7n thi\u1ebft.<\/p>\n<h3>X\u00e1c \u0111\u1ecbnh ng\u01b0\u1eddi d\u00f9ng v\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \ud83c\udfad<\/h3>\n<p>B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh ai ho\u1eb7c c\u00e1i g\u00ec t\u01b0\u01a1ng t\u00e1c v\u1edbi h\u1ec7 th\u1ed1ng. \u0110\u00e2y l\u00e0 nh\u1eefng<strong>ng\u01b0\u1eddi d\u00f9ng<\/strong>. C\u00e1c t\u00e1c nh\u00e2n c\u00f3 th\u1ec3 l\u00e0 ng\u01b0\u1eddi d\u00f9ng, c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng.<\/p>\n<ul>\n<li><strong>C\u00e1c t\u00e1c nh\u00e2n ch\u00ednh:<\/strong>Ng\u01b0\u1eddi d\u00f9ng kh\u1edfi t\u1ea1o h\u1ec7 th\u1ed1ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau.<\/li>\n<li><strong>C\u00e1c t\u00e1c nh\u00e2n ph\u1ee5:<\/strong>C\u00e1c h\u1ec7 th\u1ed1ng ho\u1eb7c thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3 c\u00e1c t\u00e1c nh\u00e2n ch\u00ednh.<\/li>\n<\/ul>\n<p>Sau khi x\u00e1c \u0111\u1ecbnh c\u00e1c t\u00e1c nh\u00e2n, h\u00e3y l\u1eadp b\u1ea3n \u0111\u1ed3 c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a ch\u00fang. M\u1ed9t <strong>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/strong>m\u00f4 t\u1ea3 m\u1ed9t t\u01b0\u01a1ng t\u00e1c c\u1ee5 th\u1ec3 gi\u1eefa m\u1ed9t t\u00e1c nh\u00e2n v\u00e0 h\u1ec7 th\u1ed1ng nh\u1eb1m \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3.<\/p>\n<h3>M\u00f4 h\u00ecnh h\u00f3a mi\u1ec1n d\u1eef li\u1ec7u \ud83d\uddfa\ufe0f<\/h3>\n<p>\u1ede b\u01b0\u1edbc n\u00e0y, b\u1ea1n x\u00e1c \u0111\u1ecbnh c\u00e1c kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i ho\u1eb7c <strong>l\u1edbp<\/strong>t\u1ed3n t\u1ea1i trong mi\u1ec1n v\u1ea5n \u0111\u1ec1. B\u1ea1n ch\u01b0a vi\u1ebft m\u00e3 ngu\u1ed3n; b\u1ea1n \u0111ang m\u00f4 h\u00ecnh h\u00f3a c\u00e1c kh\u00e1i ni\u1ec7m.<\/p>\n<ul>\n<li><strong>Nh\u1eadn di\u1ec7n danh t\u1eeb:<\/strong>\u0110\u1ecdc c\u00e1c y\u00eau c\u1ea7u v\u00e0 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c danh t\u1eeb. Ch\u00fang th\u01b0\u1eddng tr\u1edf th\u00e0nh c\u00e1c l\u1edbp ti\u1ec1m n\u0103ng.<\/li>\n<li><strong>Nh\u1eadn di\u1ec7n \u0111\u1ed9ng t\u1eeb:<\/strong>L\u00e0m n\u1ed5i b\u1eadt c\u00e1c \u0111\u1ed9ng t\u1eeb \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c ph\u01b0\u01a1ng th\u1ee9c ho\u1eb7c h\u00e0nh vi ti\u1ec1m n\u0103ng.<\/li>\n<li><strong>M\u1ed1i quan h\u1ec7:<\/strong>X\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c danh t\u1eeb n\u00e0y li\u00ean quan \u0111\u1ebfn nhau (v\u00ed d\u1ee5: m\u1ed9t <em>Sinh vi\u00ean<\/em> <em>\u0111\u0103ng k\u00fd<\/em>v\u00e0o m\u1ed9t <em>Kh\u00f3a h\u1ecdc<\/em>).<\/li>\n<\/ul>\n<h2>Giai \u0111o\u1ea1n thi\u1ebft k\u1ebf: X\u00e2y d\u1ef1ng gi\u1ea3i ph\u00e1p \ud83d\udee0\ufe0f<\/h2>\n<p>Thi\u1ebft k\u1ebf chuy\u1ec3n \u0111\u1ed5i c\u00e1c m\u00f4 h\u00ecnh ph\u00e2n t\u00edch th\u00e0nh b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf cho vi\u1ec7c tri\u1ec3n khai. N\u00f3 t\u1eadp trung v\u00e0o <em>c\u00e1ch th\u1ee9c<\/em>h\u1ec7 th\u1ed1ng s\u1ebd \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00e1c y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong giai \u0111o\u1ea1n ph\u00e2n t\u00edch. Giai \u0111o\u1ea1n n\u00e0y bao g\u1ed3m vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac l\u1edbp, m\u1ed1i quan h\u1ec7 v\u00e0 t\u01b0\u01a1ng t\u00e1c.<\/p>\n<h3>S\u01a1 \u0111\u1ed3 l\u1edbp \ud83d\udcca<\/h3>\n<p>S\u01a1 \u0111\u1ed3 l\u1edbp l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. Ch\u00fang tr\u1ef1c quan h\u00f3a c\u1ea5u tr\u00fac t\u0129nh c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<ul>\n<li><strong>C\u1ea5u tr\u00fac l\u1edbp:<\/strong> X\u00e1c \u0111\u1ecbnh c\u00e1c thu\u1ed9c t\u00ednh (tr\u01b0\u1eddng) v\u00e0 c\u00e1c thao t\u00e1c (ph\u01b0\u01a1ng th\u1ee9c) cho m\u1ed7i l\u1edbp.<\/li>\n<li><strong> \u0110\u1ed9 hi\u1ec3n th\u1ecb:<\/strong> Ch\u1ec9 ra c\u00e1c th\u00e0nh vi\u00ean c\u00f4ng khai (+), ri\u00eang t\u01b0 (-) v\u00e0 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 (#).<\/li>\n<li><strong> M\u1ed1i quan h\u1ec7:<\/strong> Hi\u1ec3n th\u1ecb c\u00e1c m\u1ed1i li\u00ean k\u1ebft, s\u1ef1 t\u1ed5ng h\u1ee3p, s\u1ef1 k\u1ebft h\u1ee3p v\u00e0 t\u00ednh k\u1ebf th\u1eeba.<\/li>\n<\/ul>\n<h3>X\u00e1c \u0111\u1ecbnh c\u00e1c m\u1ed1i quan h\u1ec7 \ud83d\udd17<\/h3>\n<p>Hi\u1ec3u c\u00e1ch c\u00e1c l\u1edbp k\u1ebft n\u1ed1i v\u1edbi nhau l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng. C\u00e1c m\u1ed1i quan h\u1ec7 sai s\u1ebd d\u1eabn \u0111\u1ebfn s\u1ef1 g\u1eafn k\u1ebft ch\u1eb7t ch\u1ebd v\u00e0 m\u00e3 ngu\u1ed3n c\u1ee9ng nh\u1eafc.<\/p>\n<ul>\n<li><strong>Li\u00ean k\u1ebft:<\/strong> M\u1ed9t m\u1ed1i quan h\u1ec7 c\u1ea5u tr\u00fac n\u01a1i c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi nhau.<\/li>\n<li><strong>K\u1ebf th\u1eeba:<\/strong> M\u1ed9t m\u1ed1i quan h\u1ec7 \u201cl\u00e0-m\u1ed9t\u201d gi\u1eefa c\u00e1c l\u1edbp.<\/li>\n<li><strong>T\u1ed5ng h\u1ee3p:<\/strong> M\u1ed9t m\u1ed1i quan h\u1ec7 \u201cc\u00f3-m\u1ed9t\u201d n\u01a1i c\u00e1c b\u1ed9 ph\u1eadn c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp v\u1edbi to\u00e0n b\u1ed9.<\/li>\n<li><strong>K\u1ebft h\u1ee3p:<\/strong> M\u1ed9t m\u1ed1i quan h\u1ec7 \u201cc\u00f3-m\u1ed9t\u201d m\u1ea1nh m\u1ebd n\u01a1i c\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng th\u1ec3 t\u1ed3n t\u1ea1i n\u1ebfu kh\u00f4ng c\u00f3 to\u00e0n b\u1ed9.<\/li>\n<\/ul>\n<h2>C\u00e1c nguy\u00ean t\u1eafc cho thi\u1ebft k\u1ebf b\u1ec1n v\u1eefng \ud83d\udee1\ufe0f<\/h2>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n v\u01b0\u1ee3t qua th\u1eed th\u00e1ch c\u1ee7a th\u1eddi gian, h\u00e3y tu\u00e2n theo c\u00e1c nguy\u00ean t\u1eafc \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp. Nh\u1eefng h\u01b0\u1edbng d\u1eabn n\u00e0y gi\u00fap qu\u1ea3n l\u00fd \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u00e0 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho vi\u1ec7c thay \u0111\u1ed5i.<\/p>\n<h3>S\u1ef1 g\u1eafn k\u1ebft v\u00e0 t\u00ednh g\u1eafn k\u1ebft \u2696\ufe0f<\/h3>\n<p>Hai kh\u00e1i ni\u1ec7m n\u00e0y c\u00f3 m\u1ed1i quan h\u1ec7 ng\u01b0\u1ee3c nhau v\u00e0 l\u00e0 n\u1ec1n t\u1ea3ng cho thi\u1ebft k\u1ebf t\u1ed1t.<\/p>\n<ul>\n<li><strong>S\u1ef1 g\u1eafn k\u1ebft:<\/strong> M\u1ee9c \u0111\u1ed9 ph\u1ee5 thu\u1ed9c l\u1eabn nhau gi\u1eefa c\u00e1c m\u00f4-\u0111un ph\u1ea7n m\u1ec1m. \u01afu ti\u00ean s\u1ef1 g\u1eafn k\u1ebft th\u1ea5p.<\/li>\n<li><strong>T\u00ednh g\u1eafn k\u1ebft:<\/strong> M\u1ee9c \u0111\u1ed9 m\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n thu\u1ed9c v\u1ec1 nhau b\u00ean trong m\u1ed9t m\u00f4-\u0111un. \u01afu ti\u00ean t\u00ednh g\u1eafn k\u1ebft cao.<\/li>\n<\/ul>\n<p>M\u1ee5c ti\u00eau h\u01b0\u1edbng \u0111\u1ebfn<strong>T\u00ednh g\u1eafn k\u1ebft cao, s\u1ef1 g\u1eafn k\u1ebft th\u1ea5p<\/strong>. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ed9t thay \u0111\u1ed5i trong m\u1ed9t m\u00f4-\u0111un kh\u00f4ng bu\u1ed9c ph\u1ea3i thay \u0111\u1ed5i c\u00e1c m\u00f4-\u0111un kh\u00e1c.<\/p>\n<h3>C\u00e1c nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf<\/h3>\n<p>M\u1ed9t s\u1ed1 nguy\u00ean t\u1eafc h\u01b0\u1edbng d\u1eabn c\u00e1c quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. T\u1eadp trung v\u00e0o nh\u1eefng nguy\u00ean t\u1eafc n\u00e0y gi\u00fap duy tr\u00ec m\u1ed9t ki\u1ebfn tr\u00fac s\u1ea1ch s\u1ebd.<\/p>\n<ul>\n<li><strong>Tr\u00e1ch nhi\u1ec7m \u0111\u01a1n nh\u1ea5t:<\/strong> M\u1ed9t l\u1edbp n\u00ean c\u00f3 m\u1ed9t v\u00e0 ch\u1ec9 m\u1ed9t l\u00fd do \u0111\u1ec3 thay \u0111\u1ed5i.<\/li>\n<li><strong>M\u1edf\/\u0110\u00f3ng:<\/strong>C\u00e1c th\u1ef1c th\u1ec3 ph\u1ea7n m\u1ec1m n\u00ean \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng nh\u01b0ng \u0111\u00f3ng \u0111\u1ed1i v\u1edbi thay \u0111\u1ed5i.<\/li>\n<li><strong>Thay th\u1ebf Liskov:<\/strong>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng trong m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh n\u00ean c\u00f3 th\u1ec3 thay th\u1ebf b\u1eb1ng c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a ki\u1ec3u con c\u1ee7a ch\u00fang m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i t\u00ednh \u0111\u00fang \u0111\u1eafn c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh \u0111\u00f3.<\/li>\n<li><strong>T\u00e1ch bi\u1ec7t giao di\u1ec7n:<\/strong>Kh\u00e1ch h\u00e0ng kh\u00f4ng n\u00ean b\u1ecb bu\u1ed9c ph\u1ea3i ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c giao di\u1ec7n m\u00e0 h\u1ecd kh\u00f4ng s\u1eed d\u1ee5ng.<\/li>\n<li><strong>\u0110\u1ea3o ng\u01b0\u1ee3c ph\u1ee5 thu\u1ed9c:<\/strong>C\u00e1c module c\u1ea5p cao kh\u00f4ng n\u00ean ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c module c\u1ea5p th\u1ea5p. C\u1ea3 hai \u0111\u1ec1u n\u00ean ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1eebu t\u01b0\u1ee3ng.<\/li>\n<\/ul>\n<h2>So s\u00e1nh Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf \ud83d\udcc9<\/h2>\n<p>M\u1eb7c d\u00f9 c\u00f3 li\u00ean quan, Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf ph\u1ee5c v\u1ee5 c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c nhau. Vi\u1ec7c nh\u1ea7m l\u1eabn ch\u00fang c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ed9t gi\u1ea3i ph\u00e1p \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u nh\u01b0ng v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt l\u00e0 kh\u00f4ng kh\u1ea3 thi.<\/p>\n<table>\n<thead>\n<tr>\n<th>Kh\u00eda c\u1ea1nh<\/th>\n<th>Ph\u00e2n t\u00edch<\/th>\n<th>Thi\u1ebft k\u1ebf<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Tr\u1ecdng t\u00e2m<\/strong><\/td>\n<td>L\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1<\/td>\n<td>L\u0129nh v\u1ef1c gi\u1ea3i ph\u00e1p<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u00e2u h\u1ecfi<\/strong><\/td>\n<td>\u201cH\u1ec7 th\u1ed1ng l\u00e0m g\u00ec?\u201d<\/td>\n<td>\u201cH\u1ec7 th\u1ed1ng l\u00e0m nh\u01b0 th\u1ebf n\u00e0o?\u201d<\/td>\n<\/tr>\n<tr>\n<td><strong>S\u1ea3n ph\u1ea9m<\/strong><\/td>\n<td>S\u01a1 \u0111\u1ed3 Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng, M\u00f4 h\u00ecnh mi\u1ec1n<\/td>\n<td>S\u01a1 \u0111\u1ed3 L\u1edbp, S\u01a1 \u0111\u1ed3 Chu\u1ed7i<\/td>\n<\/tr>\n<tr>\n<td><strong>Chi ti\u1ebft k\u1ef9 thu\u1eadt<\/strong><\/td>\n<td>Th\u1ea5p (Kh\u00f4ng ph\u1ee5 thu\u1ed9c tri\u1ec3n khai)<\/td>\n<td>Cao (Thu\u1ed9c v\u1ec1 ng\u00f4n ng\u1eef c\u1ee5 th\u1ec3)<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u00e1c b\u00ean li\u00ean quan<\/strong><\/td>\n<td>Ng\u01b0\u1eddi d\u00f9ng kinh doanh, Kh\u00e1ch h\u00e0ng<\/td>\n<td>L\u1eadp tr\u00ecnh vi\u00ean, Ki\u1ebfn tr\u00fac s\u01b0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh \u26a0\ufe0f<\/h2>\n<p>Ngay c\u1ea3 nh\u1eefng chuy\u00ean gia c\u00f3 kinh nghi\u1ec7m c\u0169ng c\u00f3 th\u1ec3 r\u01a1i v\u00e0o b\u1eaby khi \u00e1p d\u1ee5ng OOAD. Vi\u1ec7c nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn n\u00e0y c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m r\u1ea5t nhi\u1ec1u th\u1eddi gian trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n.<\/p>\n<ul>\n<li><strong>Thi\u1ebft k\u1ebf qu\u00e1 m\u1ee9c:<\/strong>T\u1ea1o ra c\u00e1c c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p v\u00e0 m\u1eabu m\u00e3 ph\u1ee9c t\u1ea1p cho nh\u1eefng v\u1ea5n \u0111\u1ec1 \u0111\u01a1n gi\u1ea3n. B\u1eaft \u0111\u1ea7u \u0111\u01a1n gi\u1ea3n v\u00e0 tinh ch\u1ec9nh l\u1ea1i sau n\u00e0y.<\/li>\n<li><strong>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng Ch\u00faa:<\/strong>C\u00e1c l\u1edbp bi\u1ebft qu\u00e1 nhi\u1ec1u v\u00e0 l\u00e0m qu\u00e1 nhi\u1ec1u. Ch\u00fang tr\u1edf n\u00ean kh\u00f3 ki\u1ec3m th\u1eed v\u00e0 b\u1ea3o tr\u00ec.<\/li>\n<li><strong>K\u1ebft n\u1ed1i ch\u1eb7t ch\u1ebd:<\/strong>C\u00e1c l\u1edbp ph\u1ee5 thu\u1ed9c m\u1ea1nh v\u00e0o chi ti\u1ebft b\u00ean trong c\u1ee7a c\u00e1c l\u1edbp kh\u00e1c. \u0110i\u1ec1u n\u00e0y khi\u1ebfn vi\u1ec7c tinh ch\u1ec9nh tr\u1edf th\u00e0nh \u00e1c m\u1ed9ng.<\/li>\n<li><strong>B\u1ecf qua giao di\u1ec7n:<\/strong>Vi\u1ebft m\u00e3 tr\u1ef1c ti\u1ebfp cho c\u00e1c l\u1edbp c\u1ee5 th\u1ec3 thay v\u00ec giao di\u1ec7n. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m t\u00ednh linh ho\u1ea1t.<\/li>\n<li><strong>S\u1ef1 tr\u1eebu t\u01b0\u1ee3ng n\u00f4ng c\u1ea1n:<\/strong>T\u1ea1o ra c\u00e1c tr\u1eebu t\u01b0\u1ee3ng kh\u00f4ng mang l\u1ea1i gi\u00e1 tr\u1ecb ho\u1eb7c x\u1eed l\u00fd c\u00e1c tr\u01b0\u1eddng h\u1ee3p bi\u00ean k\u00e9m hi\u1ec7u qu\u1ea3.<\/li>\n<\/ul>\n<h2>L\u1ea5p \u0111\u1ea7y kho\u1ea3ng c\u00e1ch: T\u1eeb m\u00f4 h\u00ecnh \u0111\u1ebfn m\u00e3 ngu\u1ed3n \ud83d\udcbb<\/h2>\n<p>M\u1ed9t khi thi\u1ebft k\u1ebf ho\u00e0n t\u1ea5t, b\u01b0\u1edbc chuy\u1ec3n sang tri\u1ec3n khai s\u1ebd b\u1eaft \u0111\u1ea7u. B\u01b0\u1edbc n\u00e0y \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 ngu\u1ed3n ph\u00f9 h\u1ee3p v\u1edbi thi\u1ebft k\u1ebf.<\/p>\n<ul>\n<li><strong>T\u00ednh nh\u1ea5t qu\u00e1n:<\/strong>\u0110\u1ea3m b\u1ea3o t\u00ean bi\u1ebfn v\u00e0 t\u00ean l\u1edbp trong m\u00e3 ngu\u1ed3n ph\u00f9 h\u1ee3p v\u1edbi s\u01a1 \u0111\u1ed3 thi\u1ebft k\u1ebf.<\/li>\n<li><strong>X\u00e1c minh:<\/strong>Xem x\u00e9t m\u00e3 ngu\u1ed3n theo c\u00e1c nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf. M\u00e3 ngu\u1ed3n c\u00f3 tu\u00e2n theo Nguy\u00ean t\u1eafc Tr\u00e1ch nhi\u1ec7m \u0110\u01a1n nh\u1ea5t kh\u00f4ng?<\/li>\n<li><strong>L\u1eb7p l\u1ea1i:<\/strong>Thi\u1ebft k\u1ebf kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t s\u1ef1 ki\u1ec7n duy nh\u1ea5t. Khi y\u00eau c\u1ea7u thay \u0111\u1ed5i, h\u00e3y c\u1eadp nh\u1eadt m\u00f4 h\u00ecnh v\u00e0 m\u00e3 ngu\u1ed3n.<\/li>\n<li><strong>T\u00e0i li\u1ec7u:<\/strong>Gi\u1eef t\u00e0i li\u1ec7u thi\u1ebft k\u1ebf lu\u00f4n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt. T\u00e0i li\u1ec7u l\u1ed7i th\u1eddi c\u00f2n t\u1ec7 h\u01a1n c\u1ea3 kh\u00f4ng c\u00f3 t\u00e0i li\u1ec7u.<\/li>\n<\/ul>\n<h2>C\u00f4ng c\u1ee5 v\u00e0 k\u1ef9 thu\u1eadt \ud83d\udee0\ufe0f<\/h2>\n<p>M\u1eb7c d\u00f9 b\u1ea1n kh\u00f4ng c\u1ea7n ph\u1ea7n m\u1ec1m c\u1ee5 th\u1ec3 \u0111\u1ec3 th\u1ef1c h\u00e0nh OOAD, nh\u01b0ng c\u00e1c c\u00f4ng c\u1ee5 tr\u1ef1c quan gi\u00fap \u00edch r\u1ea5t nhi\u1ec1u. C\u00e1c c\u00f4ng c\u1ee5 v\u1ebd s\u01a1 \u0111\u1ed3 cho ph\u00e9p b\u1ea1n ph\u00e1c th\u1ea3o m\u00f4 h\u00ecnh tr\u01b0\u1edbc khi vi\u1ebft m\u00e3. B\u1ea3ng tr\u1eafng c\u0169ng r\u1ea5t tuy\u1ec7t v\u1eddi cho c\u00e1c bu\u1ed5i h\u1ecdp h\u1ee3p t\u00e1c, n\u01a1i b\u1ea1n c\u00f3 th\u1ec3 v\u1ebd c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 l\u1eb7p l\u1ea1i nhanh ch\u00f3ng.<\/p>\n<p>Khi l\u1eadp t\u00e0i li\u1ec7u, h\u00e3y c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng c\u00e1c k\u00fd hi\u1ec7u chu\u1ea9n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c nh\u00f3m. K\u00fd hi\u1ec7u chu\u1ea9n gi\u00fap c\u00e1c nh\u00f3m kh\u00e1c nhau hi\u1ec3u ki\u1ebfn tr\u00fac m\u00e0 kh\u00f4ng g\u00e2y hi\u1ec3u l\u1ea7m.<\/p>\n<h2>Suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 OOAD \ud83d\ude80<\/h2>\n<p>Th\u00e0nh th\u1ea1o Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t h\u00e0nh tr\u00ecnh, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111\u00edch \u0111\u1ebfn. N\u00f3 \u0111\u00f2i h\u1ecfi th\u1ef1c h\u00e0nh v\u00e0 tinh th\u1ea7n s\u1eb5n s\u00e0ng tinh ch\u1ec9nh l\u1ea1i. M\u1ee5c ti\u00eau kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ea1o ra nh\u1eefng s\u01a1 \u0111\u1ed3 ho\u00e0n h\u1ea3o, m\u00e0 l\u00e0 t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u00e0 ph\u00e1t tri\u1ec3n m\u1ed9t c\u00e1ch tr\u00f4i ch\u1ea3y.<\/p>\n<p>B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o c\u00e1c tr\u1ee5 c\u1ed9t c\u1ed1t l\u00f5i, t\u00f4n tr\u1ecdng s\u1ef1 ph\u00e2n bi\u1ec7t gi\u1eefa ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf, v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n, b\u1ea1n s\u1ebd x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc. N\u1ec1n t\u1ea3ng n\u00e0y h\u1ed7 tr\u1ee3 to\u00e0n b\u1ed9 v\u00f2ng \u0111\u1eddi ph\u1ea7n m\u1ec1m, t\u1eeb \u00fd t\u01b0\u1edfng ban \u0111\u1ea7u \u0111\u1ebfn b\u1ea3o tr\u00ec d\u00e0i h\u1ea1n.<\/p>\n<p>H\u00e3y nh\u1edb r\u1eb1ng thi\u1ebft k\u1ebf t\u1ed1t nh\u1ea5t th\u01b0\u1eddng l\u00e0 thi\u1ebft k\u1ebf \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u. Tr\u00e1nh th\u00eam ph\u1ee9c t\u1ea1p ch\u1ec9 v\u00ec ph\u1ee9c t\u1ea1p. T\u1eadp trung v\u00e0o s\u1ef1 r\u00f5 r\u00e0ng, kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec v\u00e0 t\u00ednh linh ho\u1ea1t. V\u1edbi nh\u1eefng nguy\u00ean t\u1eafc n\u00e0y trong t\u00e2m tr\u00ed, b\u1ea1n c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m v\u01b0\u1ee3t qua th\u1eed th\u00e1ch c\u1ee7a th\u1eddi gian v\u00e0 th\u00edch nghi v\u1edbi nhu c\u1ea7u thay \u0111\u1ed5i c\u1ee7a doanh nghi\u1ec7p.<\/p>\n<p>V\u1eabn ti\u1ebfp t\u1ee5c luy\u1ec7n t\u1eadp. V\u1ebd s\u01a1 \u0111\u1ed3. Tinh ch\u1ec9nh m\u00e3 ngu\u1ed3n. Giao l\u01b0u v\u1edbi \u0111\u1ed3ng nghi\u1ec7p. Nh\u1eefng k\u1ef9 n\u0103ng c\u1ea7n thi\u1ebft cho OOAD hi\u1ec7u qu\u1ea3 ph\u00e1t tri\u1ec3n theo th\u1eddi gian nh\u1edd \u00e1p d\u1ee5ng li\u00ean t\u1ee5c. B\u1eaft \u0111\u1ea7u t\u1eeb nh\u1ecf, x\u00e2y d\u1ef1ng s\u1ef1 t\u1ef1 tin, d\u1ea7n d\u1ea7n \u0111\u1ed1i m\u1eb7t v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p h\u01a1n. C\u00f4ng s\u1ee9c \u0111\u1ea7u t\u01b0 v\u00e0o ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf \u0111\u00fang \u0111\u1eafn s\u1ebd mang l\u1ea1i l\u1ee3i \u00edch su\u1ed1t v\u00f2ng \u0111\u1eddi d\u1ef1 \u00e1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong b\u1ed1i c\u1ea3nh r\u1ed9ng l\u1edbn c\u1ee7a k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m, \u00edt kh\u00e1i ni\u1ec7m n\u00e0o c\u00f3 t\u00ednh n\u1ec1n t\u1ea3ng b\u1eb1ng Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOAD). D\u00f9 b\u1ea1n&hellip;<\/p>\n","protected":false},"author":1,"featured_media":74,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Nh\u1eefng \u0111i\u1ec1u c\u1ea7n thi\u1ebft v\u1ec1 Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83c\udfd7\ufe0f","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1c n\u1ec1n t\u1ea3ng OOAD. Kh\u00e1m ph\u00e1 ph\u00e2n t\u00edch, thi\u1ebft k\u1ebf v\u00e0 c\u00e1c nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m m\u1ea1nh m\u1ebd trong b\u1ea5t k\u1ef3 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh n\u00e0o.","inline_featured_image":false,"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[14],"tags":[6,13],"class_list":["post-73","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-object-oriented-analysis-and-design","tag-academic","tag-object-oriented-analysis-and-design"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nh\u1eefng \u0111i\u1ec1u c\u1ea7n thi\u1ebft v\u1ec1 Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83c\udfd7\ufe0f<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1c n\u1ec1n t\u1ea3ng OOAD. 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