Mathematics · Operation Research

For a particular project, six activities are to be carried out. The precedence relations and durations of the activities are given below: Activity A: Predecessor = None, Duration = 6 days Activity B: Predecessor = A, Duration = 5 days Activity C: Predecessor = A, Duration = 8 days Activity D: Predecessor = B, Duration = 11 days Activity E: Predecessor = C, Duration = 6 days Activity F: Predecessor = D, E, Duration = 7 days The minimum project completion time (in days) is: