SOFTWARE DEVELOPMENT LIFECYCLE

SOFTWARE DEVELOPMENT LIFECYCLE

1. SPIRAL LIFE CYCLE MODEL

   • The Spiral life cycle model is similar to the Incremental model but incorporates risk analysis. It is divided into four phases: planning, risk analysis, engineering, and evaluation. A project passes through each of these phases in sequence, repeatedly, in a series of iterations called spirals.
   • PLANNING
     • RISK ANALYSIS
       • ENGINEERING
         • EVALUATION
           • COSTUMER EVALUATION
             • PROJECT COST
         • CODING
           • TESTING
       • RISK ANALYSIS
         • PROTOTYPING
     • REQUIREMENTS GATHERING

2. WATERFALL LIFE CYCLE MODEL

   • The Waterfall model is characterized by a series of steps that must be completed in a linear, sequential order. 
   • REQUIREMENTS
     • DESING
       • IMPLEMENTATION AND UNIT TESTING
         • INTEGRATION AND SYSTEM TESTING
           • OPERATION

3. V-SHAPED LIFE CYCLE MODEL

   • The V-Shaped life cycle model provides a sequential path of discrete phases that must each be completed before development proceeds to the next phase. 
   • REQUIREMENTS
     • SYSTEM TEST PLANNING
       • SYSTEM TESTING
         • INTEGRATION TESTING
           • UNIT TESTING
     • HIGH LEVEL DESING
       • INTEGRATION TEST PLANNING
       • LOW LEVEL DESING
         • UNIT TEST PLANNING
         • IMPLEMENTATION

4. INCREMENTAL LIFE CYCLE MODEL

   • The Incremental life cycle model builds an iterative approach into the Waterfall model. 
   • REQUIREMENTS
     • DESING
       • IMPLEMENTATION AND UNIT TESTING
         • INTEGRATION AND SYSTEM TESTING
           • OPERATION

5. SOFTWARE DEVELOPMENT LIFE CYCLE MODEL

   • The term software development life cycle model is a way of describing the planning, designing, coding, and testing of a software system, as well as the method in which these steps are implemented.
   • REQUIREMENTS
     • DESING
       • IMPLEMENTATION
         • TESTING

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