What is Spiral Model? Winamp Pro V5 64 Serial Rar. Spiral Model is a combination of a waterfall model and iterative model.

Each phase in spiral model begins with a design goal and ends with the client reviewing the progress. The spiral model was first mentioned by Barry Boehm in his 1986 paper.

The development team in Spiral-SDLC model starts with a small set of requirement and goes through each development phase for those set of requirements. The development team adds functionality for the additional requirement in every-increasing spirals until the application is ready for the production phase. Spiral Model of SDLC spans into four phases. Adobe Flash Player 9 Nokia 5800 on this page. Spiral Model Phases Activities performed during phase Planning • It includes estimating the cost, schedule and resources for the iteration. It also involves understanding the system requirements for continuous communication between the system analyst and the customer Risk Analysis • Identification of potential risk is done while risk mitigation strategy is planned and finalized Engineering • It includes testing, coding and deploying software at the customer site Evaluation • Evaluation of software by the customer. Also, includes identifying and monitoring risks such as schedule slippage and cost overrun When to use Spiral-SDLC Model? • When project is large • When releases are required to be frequent • When creation of a prototype is applicable • When risk and costs evaluation is important • For medium to high-risk projects • When requirements are unclear and complex • When changes may require at any time • When long term project commitment is not feasible due to changes in economic priorities Advantages and Disadvantages of Spiral Model.