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Prototyping ModelPrototypes mean any Software that are assigned for conducting pre- experiment over it. And after checking its durability and maintainance, launce it in a final programmes for performing a specific task.Advantages Analysis inedequate Require excessive time Development of user's misunderstanding Implementation costIterative Software Models Spiral Method  Agile developmentSpiral MethodIn this method, the developers try to maintain
the balancing benefits of top down and bottom up principles. It resulted from combining both development and prototype models . It integrated in its function with waterfall model. Spiral method is preferred in massive, expensive and complex projects. This model is almost similar to waterfall method in sequences,divided by preparation, risk assessment and similarity in structure.Advantages uses as symbol|model for research process Developer's early experiment Repeated the action and launch it as commercial finallyDisadvantages Require time and cost to its final production
 Performing a specific task for evaluation and good results Designed just as a model with no usage in futureAgile DevelopmentIt develop for increasive and gradual growth where it can be finalized with the inter-functioning group collaboration.Advantages Reducing time requirement Wider space for customer's interaction and feedback Satisfied Customer in the possible wayDisadvantagesCapableness Needs user's communication and corporation
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