To describe the logic of complex processes

and workflows

To show real-time execution flow

To model the physical structure of a system

To define object relationships

Design and implementation

Evolution

Verification

Validation

Process-oriented Approach – Focus on how NFRs can be used in the design process

Qualitative Approach – Study various relationships between quality goals

Quantitative Approach – Find measurable scales for the functionality attributes

Product-oriented Approach – Focus on system (or software) quality

Dependency

Generalization

Realization

Aggregation

Functionality

Performance

Design solutions

External Interfaces

Clarity and Completeness

Code Optimization

Simplicity

Modularity

Reusability of code

Better maintainability

Improved security through encapsulation

Higher complexity in small projects