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Requirements Modeling –Object Oriented Analysis: Modeling is based on…

- - - - development view:how the system parts are organized into modules and components, and shows the layering structure of the system's architecture. Component and Package diagrams are staticmodels
      - a process view:how the system is integrated into its whole, it models the processes and their communication, in addition tackles some nonfunctional requirements such as performance, availability, concurrency, and fault tolerance. Interaction, State Machine, and Activity diagrams are dynamicmodels
      - physical view: the physical design of the system as it will be deployed,Deployment diagrams are staticmodels
      - logical view: make up the system, and how these parts interact with each other to fulfill the system's functionality.Class diagrams are staticmodelsInteraction (Sequence, Communication, Timing), State Machine, and Activity diagrams are dynamicmodels
      - Scenarios:Use Case diagrams and descriptions are staticmodels
        
        A Use Case is a set of scenarios that describes system’s interaction with actors
        
        Actors are black boxes: people, applications, or any entity
        
        Each Use Case captures a system’s functionality
        
        In the 4+1 View Model, Use Case view drives all other views