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Genral responsibility assignment software principles (GRASP) allow to embed most of the quality of service attribute in your software e.g. simplicity, supportability, operatibility, performance etc.
General Responsibility Assignment Software Patterns or Principles
- Information Expert : Class has the information to fulfill its responsibilities.
- Creator
– Controller: Which object will receive and coordinate system operations.
- Low Coupling: Reduce impact of change.
- High Cohesion: Keep object focused, understandable and manageable to support low coupling.
- Polymorphism
- Pure Fabrication: Assign a highly cohesive set of responsibilities to an artificial class that does not represent a problem domain concept to support high cohesion low coupling and reuse.
- Indirection: Avoid direct coupling and assign responsibilities to an intermediate object.
- Protected Variations: Identify point of predicted variation or instability assign responsibilities to create a stable interface around them.
