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Intense competition in many industries forces manufacturing firms to develop new, higher quality products at an increasingly rapid pace. Overlapping product development activities is an important component of concurrent product development that can help firms develop products faster. However, since product development activities may be coupled in complex ways, overlapping interrelated activities can present many difficulties. Without careful management of the overlapped product development process, the development effort and cost may increase, and product quality may worsen. This paper goes beyond the common recommendation to simply overlap activities as much as possible. We present a model-based framework to manage the overlapping of coupled product development activities. The model and framework identify conditions under which various types of overlapping are appropriate for a pair of …