In order to manage a project, the Critical Path Method(CPM) is used to estimate the duration of projects and their costs. Still, in different situations, these times could vary, so the Program Evaluation Technique(PERT) is designed using three estimated times, Optimistic time estimate, realistic...

In this paper, we propose a novel operational law for calculating the credibility distribution of monotone functions of independent regular fuzzy numbers to study the project scheduling problem with partially (or fully) fuzzy activity durations. In this regard, we formulate three corresponding...