The Spiral Model is another method of Traditional Software Development. This method only has 4 stages. Planning, Risk Analysis, Engineering and Evaluation. Software projects repeatedly pass through phases in spirals called iterations. This model is based on a number of prototypes that go through each phase.
1. Planning -This stage involves identify the objectives (what the IS should do), Identify the resources and constraints associated with the project.
2. Risk Analysis – Evaluating the options relative to objectives and constraints and conduct a risk resolution are an essential part of this stage.
3. Engineering – This phase involves developing parts of the system for example the software requirements or design aspect.
4. Evaluation- This phase involves planning the next phase, this depends on what kind of prototype stage its on.