![1. Predictive, Waterfall-Like
Processes
? Th?t b?i:
?K?t qu? th?ng k¨º(Standish Group¡¯s Chaos report
survey [Standish 1994]):
?31% b? h?y tr??c khi ho¨¤n th¨¤nh.
?53% d? ¨¢n c¨® ch? ph¨ª > 189% c¨¢c ??c l??ng c?a ch¨²ng.
?Ch? 16% d? ¨¢n ???c ho¨¤n th¨¤nh ?¨²ng th?i h?n v¨¤ trong
kinh ph¨ª.
?V?i c¨¢c c?ng ty l?n, ch? 42% ??c tr?ng/ch?c n?ng c?a
p.m?m ???c ph¨¢t h¨¤nh m?t c¨¢ch ??y ??.](https://image.slidesharecdn.com/topic1sdlcoverview-240814044726-41ea15bd/85/Topic1_SDLC-Software-Development-Life-Cycle-_Overview-pdf-13-320.jpg)
Topic1_SDLC(Software Development Life Cycle)_Overview.pdf
- 1. Software Development Life Cycle (SDLC) - Overview Topic 1: TR??NG ??I H?C C?NG NGH? TH?NG TIN & TRUY?N TH?NG KHOA C?NG NGH? TH?NG TIN - B? M?N C?NG NGH? PH?N M?M --------------- Gi?ng vi¨ºn: Ph?m Th? Th??ng ¨C B? m?n CNPM ¨C Khoa CNTT Email: ptthuong@ictu.edu.vn
- 2. N?i dung ch¨ªnh 1. V¨°ng ??i ph¨¢t tri?n ph?n m?m - Software Development Life Cycle (SDLC) 2. S? l??c l?ch s? ph¨¢t tri?n c?a c¨¢c ti?n tr¨¬nh ph?n m?m 3. H?p nh?t Ph¨¢t tri?n (Dev) & V?n h¨¤nh (Ops) ph?n m?m - DevOps
- 3. 1. Development Life Cycle (SDLC) ? SDLC (also called Software process): ? Is a set of processes is used to develop and deliver high quality software ? Is structured in different stages (what-how-build-use) ? Can be accomplished using different models (SDLC models) ?SDLC models: descripte phased of the software cycle & the order in which those phases are executed ?Ex., Water fall model, V-model, RUP, ¡
- 4. N?i dung ch¨ªnh 1. V¨°ng ??i ph¨¢t tri?n ph?n m?m - Software Development Life Cycle (SDLC) 2. S? l??c l?ch s? ¡ü c¨¢c ti?n tr¨¬nh p.m?m 3. H?p nh?t Ph¨¢t tri?n (Dev) & V?n h¨¤nh (Ops) ph?n m?m - DevOps
- 5. 2. L?ch s? ¡ü c¨¢c ti?n tr¨¬nh p.m?m ? Xem h¨¬nh (d??i)
- 7. 1. Predictive, Waterfall-Like Processes ? Figure 1-2. Simplified ¡°waterfall¡± model. ? Also called Linear ¨C Sequential Life Cycle Model ?Progress flows top to bottom, like a waterfall.
- 8. 1. Predictive, Waterfall-Like Processes => C¨¢c v?n ?? n?y sinh?
- 9. 1. Predictive, Waterfall-Like Processes ? C¨¢c v?n ?? n?y sinh: ? V?n ?? 1: ? Test ch? b?t ??u sau khi vi?c ph¨¢t tri?n ho¨¤n th¨¤nh. => V ¨C model l¨¤ m?t bi?n th? c?a Waterfall model ? Test ???c l?p k? ho?ch // v?i t?ng giai ?o?n t??ng ?ng. ? Xem h¨¬nh:
- 10. 1. Predictive, Waterfall-Like Processes ? C¨¢c v?n ?? n?y sinh: ? V?n ?? 2: ?X? l? kh?ng hi?u qu? c¨¢c y¨ºu c?u: ? Y¨ºu c?u: Fixed ? Y¨ºu c?u: l¨¤ c? s? ?? ??c l??ng l?ch bi?u v¨¤ ng?n qu? c?a d? ¨¢n => Xem H¨¬nh (d??i)
- 11. 1. Predictive, Waterfall-Like Processes ? Figure 1-2: Y¨ºu c?u c? s? ??c l??ng cost + schedule
- 12. 1. Predictive, Waterfall-Like Processes ?Y¨ºu c?u: fixed ? schedule v¨¤ budget c?ng b? fixed: ? D?n ch¨²ng ta ??n c?m b?y ¡°tam gi¨¢c th¨¦p¡± (¡°iron triangle¡± trap) nh? h¨¬nh Figure 1-4: ? Tr?t h?p, r¨¤ng bu?c ? Kh?ng th? th¨ªch nghi, m? r?ng, thay ??i, ¡ ? Nguy¨ºn nh?n th?t b?i c¨¢c d? ¨¢n:
- 13. 1. Predictive, Waterfall-Like Processes ? Th?t b?i: ?K?t qu? th?ng k¨º(Standish Group¡¯s Chaos report survey [Standish 1994]): ?31% b? h?y tr??c khi ho¨¤n th¨¤nh. ?53% d? ¨¢n c¨® ch? ph¨ª > 189% c¨¢c ??c l??ng c?a ch¨²ng. ?Ch? 16% d? ¨¢n ???c ho¨¤n th¨¤nh ?¨²ng th?i h?n v¨¤ trong kinh ph¨ª. ?V?i c¨¢c c?ng ty l?n, ch? 42% ??c tr?ng/ch?c n?ng c?a p.m?m ???c ph¨¢t h¨¤nh m?t c¨¢ch ??y ??.
- 14. 1. Predictive, Waterfall-Like Processes ? Tuy nhi¨ºn, m? h¨¬nh v?n ???c s? d?ng r?ng r?i ??n ng¨¤y nay: ? Xem: H¨¬nh 1-5
- 15. 2. Iterative & Incremental Processes ? L? do ra ??i: ? C¨¢c th?t b?i c?a m? h¨¬nh th¨¢c n??c ? S?c ¨¦p th? tr??ng ng¨¤y c¨¤ng t?ng ? S? ph¨¢t tri?n nhanh ch¨®ng, v??t b?c c?a c¨¢c k? thu?t, c?ng c?. => D?n ??n iterative processes: ?Ra ??i: 1980s v¨¤ 1990s ? Xem h¨¬nh (d??i)
- 17. 2. Iterative & Incremental Processes ? Does not attempt to start with a full specification of requirements. Instead, development begins by specify and implementing just part of software, which can then be review to identify further requirements ? This process is then repeat (Incremental), producing a new version/each cycle of the model ? The lifecycle ~ a multiple-waterfall cycle
- 18. 2. Iterative and Incremental Processes Ex., RUP RUP ¨C l?p 2 chi?u
- 19. 3. Agile (Adaptive Processes) ? G?n ??y h?n, ? M?t s? th? hi?n c?a RUP, nh?ng linh ??ng h?n, nh? h?n: ?Agile.
- 21. 3. Agile (Adaptive Processes) ? C¨¢ch ¡ü l?p l?i qua c¨¢c chu k? n??c r¨²t li¨ºn ti?p (successive sprint cycles). ? ~ Chu k? ph¨¢t tri?n ph?n m?m ???c chia th¨¤nh c¨¢c sprint cycles kho?ng t? 2 ??n 4 weeks ?D?a tr¨ºn ? t??ng: "c¨¢c chu k? nh? h?n c¨® th? ???c ph¨¢t tri?n v¨¤ qu?n l? nhanh h?n/team (developers & testers c¨´ng c?ng t¨¢c l¨¤m vi?c) ? Bugs ???c x¨¢c ??nh v¨¤ fixed s?m t?i m?i sprint ? Kh¨¢ch h¨¤ng c¨® th? nh¨¬n th?y c¨¢c ??c tr?ng s?n ph?m s?m v¨¤ t?o c¨¢c thay ??i c?n thi?t n?u c?n.
- 23. 3. Agile (Adaptive Processes) ?Qu?n l? y¨ºu c?u ?¡Ù c¨¢ch ti?p c?n truy?n th?ng: ?D?a tr¨ºn c¨¢c nguy¨ºn t?c c?t l?i: ? Tuy¨ºn ng?n #1¡ª?u ti¨ºn cao nh?t l¨¤ s? th?a m?n c?a kh¨¢ch h¨¤ng qua vi?c ph¨¢t h¨¤nh s?m v¨¤ li¨ºn t?c ph?n m?m c¨® gi¨¢ tr?. ? Tuy¨ºn ng?n #2¡ªCh¨¤o ?¨®n c¨¢c y¨ºu c?u thay ??i, th?m ch¨ª c¨¢c thay ??i sau ph¨¢t tri?n. Khai th¨¢c thay ??i t?o l?i th? c?nh tranh kh¨¢ch h¨¤ng. => Thay v¨¬ m?t h¨¤ng th¨¤ng ?? x?y d?ng c¨¢c ??c t? y¨ºu c?u chi ti?t ¡.teams t?p trung v¨¤o vi?c ph¨¢t h¨¤nh s?m s?n ph?m ??n kh¨¢ch h¨¤ng.
- 24. 3. Agile (Adaptive Processes) ? Lo?i b? tam gi¨¢c th¨¦p ?? ng?n ch?n ch¨²ng ta ??t ???c c¨¢c m?c ti¨ºu ch?t l??ng & ?? tin c?y. ? Agile fixes the date and resources and varies the scope ?Quality is also fixed. So, now we have a truly virtuous software cycle: ? Fix quality¡ªdeliver a small increment in a timebox¡ª repeat. ?Xem h¨¬nh (d??i)
- 25. 3. Agile (Adaptive Processes)
- 26. 3. Agile (Adaptive Processes) ? T?i ?u ROI (return on investment ¨C ho¨¤n v?n) qua vi?c ph¨¢t h¨¤nh gi¨¢ tr? t?ng d?n ? Agile c?ng d?a tr¨ºn nguy¨ºn t?c kinh t?: ?¡°the sooner we deliver a feature, the sooner our customers will pay us for it¡±. ? Figure 1-9: Value delivery and ROI in waterfall versus agile
- 27. 3. Agile (Adaptive Processes)
- 28. 3. Agile (Adaptive Processes) ? T?i ?u ROI ? N?u gi? ??nh v?n ??u t? l¨¤ h?ng s? (v?n ??u t? th?c t? s? th?p h?n nhi?u trong agile ~ ho¨¤n v?n (ROI) s? cao), th¨¬ ??y l¨¤ s? th?t: ?ROI $$ (agile) > ROI $ (waterfall) ? Agile ROI t?ng, do gi¨¢ tr? ??c tr?ng t?ng theo (t) ?Xem h¨¬nh (d??i)
- 29. 3. Agile (Adaptive Processes) ? T?i ?u ROI: T? xu?t l?i nhu?n g?p => ROI $$$ (agile) >> ROI $ (waterfall)
- 30. 3. Agile (Adaptive Processes) ? M?t s? ph??ng ph¨¢p Agile: ? Dynamic Systems Development Method (DSDM), ? Feature-Driven Development (FDD), ? Adaptive Software Development, ? Scrum, Extreme Programming (XP), ? Open Unified Process (Open UP), ? Agile RUP, Kanban, Lean, Crystal Methods ? ¡
- 31. 3. Agile (Adaptive Processes) ? H¨¬nh 1-7. Kh?o s¨¢t c¨¢c ph??ng ph¨¢p Agile ???c s? d?ng r?ng r?i nh?t1 1Source: VersionOne¡¯s 2009 Agile Methodology Survey
- 32. Scrum
- 33. Scrum ? ???c s? d?ng r?ng r?i ? V¨¬ s? nh? nh¨¤ng c?a n¨®, teams t?p trung ¡ü c¨¢c ??c tr?ng t?ng d?n. ? M?i ??i (team) g?m c¨¢c vai tr¨°: ? Scrum master: ? Thi?t l?p nh¨®m, x?y d?ng c¨¢c sprint meetings, lo?i b? c¨¢c kh¨® kh?n tr? ng?i trong qu¨¢ tr¨¬nh ph¨¢t tri?n. ? Product owner: ? t?o v¨¤ ?u ti¨ºn c¨¢c product backlog (~danh s¨¢ch c¨¢c features v¨¤ c¨¢c y¨ºu c?u ch?c n?ng c?n ph¨¢t tri?n), ph¨¢t h¨¤nh c¨¢c ch?c n?ng c?a s?n ph?m sau m?i sprint iteration cycle ? Developers & testers: ? qu?n l? v¨¤ t? ch?c c?ng vi?c cho ra k?t qu? c?a sprint cycle
- 34. Scrum
- 36. Extreme Programming (XP) ? XP: ???c s? d?ng r?ng r?i ? Team g?m 5 ¡ú 10 programmers: ?ng?i l¨¤m vi?c c¨´ng v?i ??i di?n c?a kh¨¢ch h¨¤ng (on-site). ? Ph¨¢t tri?n t?p trung v¨¤o vi?c ph¨¢t h¨¤nh c¨¢c ??c tr?ng t?ng d?n (builds or iterations th??ng xuy¨ºn/li¨ºn t?c). ? C¨¢c y¨ºu c?u ???c ??c t? nh? c¨¢c user stories ?m?i story ~ ch?c n?ng m?i ng??i d¨´ng y¨ºu c?u. ? Programmers l¨¤m vi?c theo c?p ?Ph?i tu?n theo strict coding standards, v¨¤ th?c hi?n unit test code c?a h?. ?Customers tham gia v¨¤o acceptance testing.
- 37. Extreme Programming (XP) ? XP th??ng ¨¢p d?ng v?i small teams (< 10 developers) ? Ch? P trong XP ch? programming => ??i l?p v?i c¨¢c ph??ng ph¨¢p kh¨¢c, XP t?p trung v¨¤o code: code ph?i tu?n theo c¨¢c chu?n nghi¨ºm ng?t v¨¤ t?o ra k?t qu? v?i ch?t l??ng c?c cao.
- 38. 4. Enterprise ¨C Scale Adaptive (Lean & Agile) Processes ? C¨® ??y ?? l?i th? c?a Agile: ? ~ Agile + Tinh g?n + ?p d?ng m?c doanh nghi?p. ? Ph¨¢t tri?n & V?n h¨¤nh ph?n m?m li¨ºn t?c.
- 40. 4. Enterprise ¨C Scale Adaptive (Lean & Agile) Processes ? DevOps ~ Lean & Agile ? H?p nh?t Dev & Ops theo ???ng ?ng t¨ªch h?p v¨¤ ph¨¢t h¨¤nh li¨ºn t?c ? Gi?i quy?t nh?ng v?n ??/th¨¢ch th?c ?ang t?n t?i v?i ti?n tr¨¬nh ph?n m?m tr??c ?¨® ?V?n ??/th¨¢ch th?c?
- 41. 1) V?n ??, th¨¢ch th?c ? C¨¢ch ti?p c?n truy?n th?ng ? V?n ?? n?y sinh 1: ?M?i giai ?o?n/SDLC b? ph?n m?nh&???c qu?n l?, tri?n khai b?i teams, departments, processes, & tools ??c l?p =>R?i ro khi b¨¤n giao k?t qu? gi?a c¨¢c giai ?o?n (l?i ph¨¢t sinh do kh?ng t??ng th¨ªch, p.m?m kh?ng v?n h¨¤nh ???c do kh?ng nh?t qu¨¢n gi?a c¨¢c m?i tr??ng c?ng t¨¢c ¡ü: Dev, QA, Product). ? M?t th?i gian: ch? ??i, b¨¤n giao th? c?ng, x? l? qu¨¢ ? Nhi?u v?n ?? t?n ??ng n?y sinh do t??ng t¨¢c gi?a c¨¢c team kh?ng hi?u qu?, kh?ng th??ng xuy¨ºn => H¨¬nh (d??i)
- 42. 1) V?n ??, th¨¢ch th?c ? Chu k? ph¨¢t h¨¤nh truy?n th?ng ¨C b? ph?n m?nh ? V¨ª d?: xem h¨¬nh (d??i)
- 43. Teams work tr?m l?ng: -T?n ??ng v?n ?? -Ph?i ch? ??i nhau -X? l? qu¨¢ B¨¤n giao th? c?ng: m? ngu?n + t¨¤i li?u => Lost time T¨ªch h?p h¨¤ng tu?n Ph?n ph?i p.m?m th? c?ng ??n QA B¨¤n giao p.m?m h¨¤ng qu? Ph¨¢t h¨¤nh p.m?m th? c?ng ??n Product B¨¤n giao th? c?ng: - apps, - t¨¤i li?u, - c?u h¨¬nh. => Lost time Thi?t l?p v¨¤ b?o tr¨¬ h? th?ng th? c?ng => Lost time+ defects Static test Unit tests Function tests
- 44. 1) V?n ??, th¨¢ch th?c ? C¨¢ch ti?p c?n truy?n th?ng ?V?n ?? n?y sinh 2: ?Xem nh? giai ?o?n v?n h¨¤nh => Nhi?u v?n ?? n?y sinh sau ?¨® ? V¨ª d?: xem h¨¬nh (d??i)
- 45. ? C¨¢ch ti?p c?n truy?n th?ng: ? V?n ?? 2: xem nh? giai ?o?n v?n h¨¤nh ? Nhi?u v?n ?? n?y sinh! ? See: Figures 1) V?n ??, th¨¢ch th?c
- 46. ? C¨¢ch ti?p c?n truy?n th?ng ? V?n ?? 3: ? for achievements Th? tr??ng th? gi?i: kinh doanh ?? th? c?ng, m? ngh? (?? c?) Gi?i ph¨¢p c?a h? g¨¬??? 1) V?n ??, th¨¢ch th?c
- 47. ? DevOps ¨C Gi?i ph¨¢p cho c¨¢c v?n ?? n¨ºu tr¨ºn => DevOps? 1) V?n ??, th¨¢ch th?c
- 48. N?i dung ch¨ªnh 1. V¨°ng ??i ph¨¢t tri?n ph?n m?m - Software Development Life Cycle (SDLC) 2. S? l??c l?ch s? ¡ü c¨¢c ti?n tr¨¬nh p.m?m 3. H?p nh?t Ph¨¢t tri?n (Dev) & V?n h¨¤nh (Ops) ph?n m?m - DevOps
- 49. 3. Gi?i ph¨¢p - DevOps ? DevOps: Put simple ¡ ¡ý th?i gian ng?ng ngh?/tr¨¬ ho?n ¡ü t¨ªnh c?nh tranh
- 50. 3. Gi?i ph¨¢p - DevOps ? DevOps ¨C The solution Combine: Dev, QA & Ops by pipeline t¨ªch h?p v¨¤ ph¨¢t h¨¤nh li¨ºn t?c
- 51. 3. Gi?i ph¨¢p - DevOps ? DevOps: ? T¨ªch h?p t?t c? c¨¢c giai ?o?n c?a SDLC v¨¤o m?t ??n v? h?p nh?t. ? ~ H? t? t??ng ho¨¤n to¨¤n m?i qu¨¦t qua c¨¢c t? ch?c CNTT tr¨ºn to¨¤n th? gi?i: ? th¨²c ??y t?i ?u SDLC, th¨²c ??y h?p t¨¢c gi?a c¨¢c k? s? ph¨¢t tri?n v¨¤ b? ph?n operation, gia t?ng l?i nhu?n, s? t.m?n c?a kh¨¢ch h¨¤ng. ? X¨®a k.c gi?a c¨¢c b¨ºn li¨ºn quan (Dev, Ops) ? ¡°Dev¡±: ~ t?t c? c¨¢c nh¨¤ ph¨¢t tri?n ph?n m?m ? ¡°Ops¡±: g?m c¨¢c k? s? h? th?ng, qu?n tr? h? th?ng, nh?n vi¨ºn operation, k? s? ph¨¢t h¨¤nh, DBA, k? s? m?ng, chuy¨ºn gia b?o m?t, v¨¤ nhi?u c?ng vi?c ph? kh¨¢c.
- 52. 3. Gi?i ph¨¢p - DevOps ? DevOps: combine Dev and Ops¡
- 53. 3. Gi?i ph¨¢p - DevOps
- 54. 3. DevOps ? DevOps - Pipeline t¨ªch h?p & ph¨¢t h¨¤nh tr¨ºn m?t ???ng ?ng li¨ºn t?c => H?p nh?t c¨¢c m?i tr??ng c?ng t¨¢c ¡ü: (Dev, QA, Ops)
- 55. 3. DevOps ? DevOps ¨C toolchain Ch?a t?ng ???c ?? c?p b?i c¨¢c software processes tr??c ?¨® ???
- 56. 3. DevOps ? Faster, better, chapter, happier
- 57. 3. DevOps ? DevOps ¨C X?y d?ng team phong ph¨²
- 58. 3. DevOps ? DevOps quan h? v?i Cloud ? => Cloud computing v¨¤ DevOps ?ang d?n chuy?n h¨®a CNTT t? n?n kinh t? s?n xu?t sang n?n kinh t? d?ch v?
- 59. 3. DevOps ¨C Xu h??ng ¡ü ? Ph¨¢t tri?n ?n ??nh qua nhi?u n?m:
- 60. 3. DevOps ¨C ?p d?ng ? S? x?m nh?p c?a DevOps v¨¤o c¨¢c doanh nghi?p => cho th?y xu h??ng ph¨¢t tri?n ti?m n?ng c?a n¨®.
- 61. 3. DevOps ¨C ?p d?ng
- 62. 3. DevOps ¨C ?p d?ng
- 63. T?ng k?t 1. V¨°ng ??i ph¨¢t tri?n ph?n m?m - Software Development Life Cycle (SDLC) 2. S? l??c l?ch s? ph¨¢t tri?n c?a c¨¢c ti?n tr¨¬nh ph?n m?m 3. H?p nh?t Ph¨¢t tri?n (Dev) & V?n h¨¤nh (Ops) ph?n m?m - DevOps
- 64. Discussion
- 65. Preparing for next lesson ? Topic 2: DevOps Frameworks