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Communication and uncertainty in concurrent engineering

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We present an analytical model of concurrent engineering, where an upstream and a downstream task are overlapped to minimize time-to-market. The gain from overlapping activities must be weighed against the delay from engineering changes and rework, which are caused by uncertainty in the development process. Communication reduces the negative effect of rework, with an additional time investment. Our model incorporates uncertainty via the average rate of engineering changes coming from the upstream task, and the evolution via the change of the modification rate over time. In addition, we model dependence by the impact the modifications impose to the downstream task. The model yields three main results about the connection between uncertainty, communication, and overlapp

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