Abstract: In repetitive project scheduling, usually it is needed to minimize the project duration when each activity is given some available productivities. First, two theorems about repetitive scheduling method are presented in this paper, where one is used to determine the calculation formula of the project duration, and another proposes the necessary conditions for any activity become the backward controlling activity. Second, an optimization model based on these two theorems is proposed to minimize both the project duration and the total interruption days. Last, the performance of the proposed algorithm is validated by comparing with other existing algorithms.

Key words: duration, backward controlling activity, repetitive construction projects, controlling path