How to calculate the Early Start (ES), Early Finish (EF), Late Start (LS), and Late Finish (LF) times in a project schedule?

To calculate Early Start (ES), Early Finish (EF), Late Start (LS), and Late Finish (LF) times in a project schedule, you can use the Critical Path Method (CPM). First, identify the tasks and their durations. Then, create a network diagram showing the sequence of tasks and their dependencies. Next, calculate the ES and EF for each task by considering the earliest possible start time and finish time. After that, calculate the LF and LS for each task by considering the latest possible start time and finish time without delaying the project. Finally, determine the critical path, which is the longest path of tasks that determines the project's overall duration.