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Chapter 3 : Requirement, Business Rules, Business req, External Interfaces…

- - - - Describe what, not how
    - - What System should do
      - More Abstract
      - How the System should do
      - More Detail
  - - - Documents
      - Meetings
      - Interviews
      - Reports
    - - Scope and price
      - Feasibility
      - Prototypes
    - - Business
      - User
      - Product
  - - - Statement of service system should provide
      - System should react to particular inputs
      - System behave in particular situations
      - Describe functionality
      - Expected users, types of software, type of system
    - - Constraint offered
        
        timing cons
        
        development process cons
        
        standards
      - Types
        
        Product Req
        
        How delivered product behave
        
        Execution speed
        
        Reliability
        
        Organization Req
        
        Consequences of organization policies and procedure
        
        Process standard
        
        Implementation req
        
        External Req
        
        Arise from factor external from system
        
        Interoperability req
        
        Legislative req
    - - Constainr on system from operation domain
    - - Critical activities that must be performed to meet business entity objective
    - - Statement in natural language
      - Diagram of services
      - Written for customers
    - - Structured document
        
        Detailed description
        
        System function
        
        Services
        
        Operation constraint
      - Defines what should be implement
      - Part of client/contractor contract