Software Development Life Cycle

Software Development Life Cycle

1. Spiral Life Cycle Model

   • Advantages of the Spiral model
     • At its core, the spiral model is based on the software development of the previous models and takes provided the cascade and incremental models
   • Disadvantages of the Spiral model
     • The risk analysis phase requires highly specific knowledge and project success depends on the output of this phase.

2. Incremental Life Cycle Model

   • Advantages of the Incremental model
     • the incremental model generates early prototypes in the development process, this model also is easy to test and debug because the test is performed incrementally during each iteration in a relatively small amount of new code.
   • Disadvantages of the Incremental model
     • The incremental model is less risky than cascade or V-shaped models, but may be inappropriate for larger long-term projects.

3. V-Shaped Life Cycle Model

   • Advantages of the V-Shaped model
     • Like the Waterfall model, the V-shaped model is suitable for small development in which the requirements are well understood.
   • Disadvantages of the V-Shaped model
     • The rigidity of the V-shaped model makes it unsuitable for most projects. Emphasis in testing planning seems to reduce risk, but, like the cascade, the model in V form runs the risk of time and energy in the absence of careful planning.

4. Software Development Life Cycle Model

   • Requirements-gathering
     • They describe the needs of the company and make their wish lists
   • Implementation
     • programmers must make their central objective, comply with the requirements of the company and with the design outlined in the design phase.
   • Testing
     • a plan to describe the unit tests and system tests to be performed
   • Design
     • In essence, during the design phase, designers try to convert the dreams of managers and users in reality.

5. Waterfall Life Cycle Model

   • Advantages of the Waterfall model
     • This model can be easy to implement and manage because each phase has a purpose specific, and development occurs in only one phase at a time.
   • Disadvantages of the Waterfall model
     • Although the Waterfall model provides a good introduction to the software lifecycle models, its usefulness is limited. Due to the rigidity of the model, all the requirements explicitly