Task time window algorithm for top-down collaborative assembly design

According to the high parallel and the dependent relationships among the tasks of the top-down collaborative assembly design process,a task time window algorithm was presented.Based on the outside and inside dependent relationships of the tasks,two methods were adopted to determine the task time window constraints:one was the paralleled sequential design activities;the other was the sequenced coupling design activities,thereby resolved the conflict in time window constraints solving process and decreased the design process waiting time.Finally,a design process stochastic planning algorithm based on design structure matrix was put forward,and the task time window was determined.