Abstract:Under the condition of limited total resources, when the same resource is supplied to multiple projects, the principle and method of project group duration compression is different from that of a single project, and not only faces the problem of reasonable allocation of limited resources, it is also necessary to consider the logical relationship between the contract items in the project group. Therefore, it is necessary to study the optimization of the project group duration under the condition of limited resources. Based on the optimization method of single project duration, considering the logical relationship between the internal contract items in the project group, and using the transfer of resources between the contract items within the project group, this paper constructs the optimization model of the project group duration under the condition of resource constraints, determine the contract items that can output and input resources, and finally achieve the purpose of project group duration optimization. The purpose of this paper is to provide new ideas and decision-making basis for solving the problem of project group construction period optimization.