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6. Software Lifecycle Models ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

6.1. Planning with Models ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Project constraints money time Computing resources staff programmers managers designers Examples of Project Constraints

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

6.2. Project Visibility ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

6.3. What is a Lifecycle Model? ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

6.4. The Waterfall Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

User Requirements Software Requirements Architecture Design Detailed design & Coding Testing Delivery The Waterfall Lifecycle Workflow Time User Requirements Document Software Requirements Document Architectural Design Document Detailed Design & Code phase output ” Swimming upstream”

Advantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Disadvantages I ,[object Object],[object Object],[object Object],[object Object]

Disadvantages II ,[object Object],[object Object],[object Object],[object Object],[object Object]

6.5. Code-and-Fix ,[object Object],[object Object],[object Object],[object Object],[object Object]

Advantages ,[object Object],[object Object],[object Object],[object Object]

Disadvantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

6.6. Spiral Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cumulative cost Evaluate alternatives, Identify & resolve risks Develop & verify next-level product Plan next phase Determine objectives, alternatives & constraints Review & commitment Prototypes P1 P2 P3 Operational Prototype Start End Requirements plan Development plan Integration & Test plan Requirements validation Design, Validation & Verification Detailed design Coding Unit & Integration Testing Acceptance Testing Concept Of Operation

Disadvantages ,[object Object],[object Object],[object Object]

6.7. Rapid Prototyping ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Requirements Capture Quick Design Build Prototype Customer Evaluation of Prototype Engineer Final Product The Rapid Prototype Workflow Iterate

Disadvantages I ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Disadvantages II ,[object Object],[object Object]

6.8. Agile (XP) Manifesto ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

6.8.1. Agile Principles (Summary) ,[object Object],[object Object],[object Object],[object Object],[object Object]

6.9. XP Practices (Summary) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Advantages ,[object Object],[object Object],[object Object],[object Object],[object Object]

Disadvantages ,[object Object],[object Object],[object Object],[object Object]

6.10. Unified Process (UP) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Inception Elaboration Construction Transition UP Lifecycle – single phase workflow (drawn as a UML Statechart!)

[object Object],[object Object],[object Object],[object Object]

Unified Process Software Lifecycle Cycle Phase Iteration Artifact Workflow Management Environment Requirements Design Implementation Assessment Deployment * * Inception Elaboration Construction Transition * * 4 Product releases

Use Case Model Analysis Model Design Model Deployment Model Implementation Model Test Model specified by realised by deployed by implemented by verified by All models are interdepedent but this only shown for use case model UML class diagram!

6.11. COTS ,[object Object],[object Object],[object Object],[object Object]

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