Software Development Life Cycle

Software Development Life Cycle

1. SOFTWARE DEVELOPMENT LIFE CYCLE MODEL

   • design, coding and testing of a software system,
     • desing
       • translate cycle models
     • Implementation
       • translate code program
     • Tests
       • run series of tests

2. WATERFALL LIFE CYCLE MODEL

   • a series of steps to be completed in a linear and sequential order
     • Advantages
       • simple and easy to use
       • suitable for youngsters projects
     • Disadvantages
       • its usefulness is limited
       • unsuitable for projects sophisticated

3. SHAPED LIFE CYCLE MODEL

   • V provides a sequential route of discrete phases
     • Advantages
       • is relatively simple and easy to use
       • Specific objectives are defined for each phase
     • Disadvantages
       • The rigidity of the V-shaped model makes it unsuitable for most projects
       • it is difficult to add or change requirements later in the development process
       • the V-shaped model risks wasting time and energy if it is not planned painstakingly

4. INCREMENTAL LIFE CYCLE MODEL

   • The incremental life cycle model builds an approach iterative in the Waterfall model. The development projects are divided into several smaller and more manageable iterations
     • Advantages
       • the Incremental model generates a working model prototype at the beginning of the development process
       • easier to test and debugr
       • is an effective tool for managing risk
     • Disadvantages
       • exhibits some rigidity in the following phases cannot overlap
       • but it may be inappropriate for large, long-term projects.

5. SPIRAL LIFE CYCLE MODEL

   • El modelo del ciclo de vida de Spiral es similar al modelo Incremental pero incorpora riesgo análisis
     • Advantages
       • The focus on risk avoidance makes the Spiral model ideal for large-scale, mission-critical applications.
       • To work the software code is developed early on
     • Disadvantages
       • Implementing the Spiral model can cost considerably more than other life cycle models.
       • The risk analysis phase requires very specific knowledge