You only need NDT.xlsm at bin folder. Any other files in a project are just used for macro development. To understand how task connection works, I reccomend you to put 3 tasks at least. Add taskname ...

Add tasks with optimistic, most likely, and pessimistic time estimates. Define task dependencies (precedence). Click the Add Activity button to create a new task. Enter the task name, optimistic time, ...

Abstract: Although Program Evaluation and Review Technique(PERT) has been applied widely in the planning and control of the project progress, there are some deficiencies, for example, the accuracy of ...