Method of Project Scheduling under Fuzziness in Estimation of Durations, Precedence Relationships and Interruptions of Activities

摘要

A fundamental limitation of traditional project scheduling techniques is that they are not able to manipulate the uncertainty and fuzziness which exist greatly in construction works. So, deterministic traditional approaches for scheduling often produce unrealistic result. In this paper, fuzzy PERT as a method for project scheduling is developed in consideration of fuzziness associated with durations, precedence relationships and interruptions of activities. To measure the possibility of the execution for a specific schedule, membership functions of those fuzziness are introduced, of which different values would provide the decision-maker with different alternative schedules. The fuzzy PERT mathematically results in an optimal model of linear programming and the process of calculation is illustrated on a small network.