SDLC Models
- 1. Software Development Life Cycle (SDLC) “You’ve got to be very careful if you don’t know where you’re going, because you might not get there.” SDLC Models
- 2. SDLC Model A framework that describes the activities performed at each stage of a software development project. Click to Read More – SDLC Models.
- 3. Waterfall Model • Requirements – defines needed information, function, behavior, performance and interfaces. • Design – data structures, software architecture, interface representations, algorithmic details. • Implementation – source code, database, user documentation, testing. Click to Read More - Waterfall Model.
- 4. Iterative Waterfall Model Click to Read More – Iterative Waterfall Model.
- 5. V-Shaped SDLC Model • A variant of the Waterfall that emphasizes the verification and validation of the product. • Testing of the product is planned in parallel with a corresponding phase of development Click to Read More – V Model / V Shaped Model.
- 7. RAD Model Click to Read More – RAD Model.
- 8. Incremental SDLC Model • Construct a partial implementation of a total system • Then slowly add increased functionality • The incremental model prioritizes requirements of the system and then implements them in groups. • Each subsequent release of the system adds function to the previous release, until all designed functionality has been implemented. Click to Read More – Incremental Model.
- 9. Spiral SDLC Model • Adds risk analysis, and 4gl RAD prototyping to the waterfall model • Each cycle involves the same sequence of steps as the waterfall process model Click to Read More – Spiral Model.
- 10. Agile SDLC’s • Speed up or bypass one or more life cycle phases • Usually less formal and reduced scope • Used for time-critical applications • Used in organizations that employ disciplined methods Click to Read More – Agile SDLC Model.
- 11. Click to Read More – Agile SDLC Model.
- 12. Some Agile Methods • Adaptive Software Development (ASD) • Feature Driven Development (FDD) • Crystal Clear • Dynamic Software Development Method (DSDM) • Rapid Application Development (RAD) • Scrum • Extreme Programming (XP) • Rational Unify Process (RUP)
- 13. Adaptive SDLC Combines RAD with software engineering best practices • Project initiation • Adaptive cycle planning • Concurrent component engineering • Quality review • Final QA and release
- 14. Capability Maturity Model (CMM) • A bench-mark for measuring the maturity of an organization’s software process • CMM defines 5 levels of process maturity based on certain Key Process Areas (KPA)
- 15. CMM Levels Level 5 – Optimizing (< 1%) -- process change management -- technology change management -- defect prevention Level 4 – Managed (< 5%) -- software quality management -- quantitative process management Level 3 – Defined (< 10%) -- peer reviews -- intergroup coordination -- software product engineering -- integrated software management -- training program -- organization process definition -- organization process focus Level 2 – Repeatable (~ 15%) -- software configuration management -- software quality assurance -- software project tracking and oversight -- software project planning -- requirements management Level 1 – Initial (~ 70%)