1. Incremental Model Requirements phase Verify Specification phase Verify
Architectural design
Verify
For each build:
Perform detailed design, implementation and integration,
test, deliver to client
Maintenance phase
Development
Maintenance
Retirement

2. Incremental Model (cont.)
Build 1
Implementation, integration
Deliver to client
Design
Specification
Implementation, integration
Deliver to client
Design
Specification
Build 2
Build 3
Implementation, integration
Deliver to client
Design
Specification
Build n
Implementation, integration
Deliver to client
Design
Specification
Specification team
Implementation, integration team
Design team

3. Spiral Model Precede each phase by Alternatives Risk analysis
Follow each phase by
Evaluation
Planning of next phase

4. Simplified Spiral Model
Risk Analysis
If risks cannot be resolved, project is immediately terminated
Design
Specification
Rapid Prototype
Implementation
Verify
Integration

5. Full Spiral Model
Radial dimension (cost)
Angular dimension (progress)

6. Software Engineering II
Lecture 4
Fakhar Lodhi

8. Object-Oriented Lifestyle Models

9. Fountain Model Features Overlap (parallelism) Arrows (iteration)
Maintenance
Further development
Fountain Model
Operations
Features
Overlap (parallelism)
Arrows (iteration)
Smaller maintenance circle
Implementation and integration
Implementation
Object-oriented design
Object-oriented analysis
Requirements