1 to 3 months
Student Software | Industrial-Strength Software |
---|---|
Developer is the User
|
Client is the User
|
Software not in critical use | Supports important business functions |
Reliability, robustness not important | Reliability, robustness very important |
No investment | Heavy investment ($5 to $25 per LOC) |
Does not care about portability | Portability allows a company to market a product on multiple platforms |
Quality Attribute | Definition |
---|---|
Functionality | The system fulfills its requirements |
Reliability | The system provides consistent performance |
Usability | The ease at which users can acquire skill with the system |
Efficiency | The system provides performance relative to its resources |
Maintainability | The system can be modified to make corrections, improvements, or adaptations |
Portability | The system can be adapted to other platforms |
corrective maintenance | To fix bugs |
adaptive maintenance | To respond to changes in the system's environment |
perfective maintenance | To add new features |
preventive maintenance | To make a system more maintainable |
[taking] software development closer to science and engineering and away from ad-hoc approaches for development whose outcomes are not predictable.