![]() Numerical examples illustrate the insights gained from the analysis. When the quality control benefit dominates, the review periods will vary only to the extent that the quality related parameters change. When the parallel development benefit dominates, the review periods either increase or decrease according to the rate at which product design work empowers useful process design work to be conducted. ![]() The optimal policy is derived for some special stationary cases of the model. The disadvantage of frequent reviews is that each review requires setup/penalty time that otherwise would not be required. Concurrent models are development models in which multiple processes or phases of the development process are carried out. Frequent reviews have two benefits: (1) (Parallel Development) process designers receive sufficient information about the design to enable them to work in parallel with the product designers, and (2) (Quality Control) flaws in the design are discovered soon after they are introduced, saving the time and resources required for redesign later. In contrast to the conventional approach, in which the product design is (nearly) completed before it is “thrown over the wall” to the process design group, concurrent design for manufacturability, as conceptualized here, conducts a number of progress reviews during the product design process. Otherwise it may lead to confusions and project failure. ![]() When a software product is developed by a team, it is necessary to have a precise understanding among the team members as to when to do what. Concurrent design can reduce the time required to develop new products and redesign old ones. 3 Why do we require a life cycle model The primary advantage is that it encourages development of software in a systematic and disciplined manner.
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