An Analysis of Strategies for Coupled Design Tasks Reviewing with Random Rework
The coupled design tasks are usually need to be confirmed by customer repeatedly before they can be completed. To evaluate the merits of the coupled design task reviewing strategy with the exponentially distributed durations, the project network is firstly transformed by regarding each rework task as a potential new task. Then, the state transition process during the project execution is described by a continuous-time Markov chain (CTMC). Finally, the probability distribution of project completion time is obtained based on the phase-type (PH) distribution, and its expectation is severed as the standard for evaluating the a given reviewing strategy. To validate the constructed model and method, a calculation example is illustrated with a simple project that consists of six activities. The experimental results show that the quality of a given reviewing strategy is related to the project environment. Meanwhile, the experimental results also bring some inspiration to the design project management.
KeywordsCoupled design Reviewing strategy Random rework CTMC PH distribution
This work was sponsored by the National Natural Science Foundation of China (No. 51505090, No. 51775120 and No. 61573109).
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