What is Spiral model?
What is Spiral model- advantages, disadvantages and when to use it? The spiral model is similar to the incremental model , with more emphasis placed on risk analysis. The spiral model has four phases: Planning, Risk Analysis, Engineering and Evaluation. A software project repeatedly passes through these phases in iterations (called Spirals in this model). The baseline spiral, starting in the planning phase, requirements are gathered and risk is assessed. Each subsequent spirals builds on the baseline spiral. Its one of the software development models like Waterfall , Agile , V-Model . Planning Phase: Requirements are gathered during the planning phase. Requirements like ‘BRS’ that is ‘Bussiness Requirement Specifications’ and ‘SRS’ that is ‘System Requirement specifications’. Risk Analysis: In the risk analysis phase , a process is undertaken to identify risk and alternate solutions. A prototype is produced a...