Which of these methods uses the 3-time estimate?a.CPMb.PERTc.Forward pass methodd.Backward pass method

To determine which method uses the 3-time estimate, let's analyze each option:

a. CPM (Critical Path Method): The CPM method does not use the 3-time estimate. It focuses on determining the critical path and calculating the project duration based on the estimated time for each activity.

b. PERT (Program Evaluation and Review Technique): The PERT method does use the 3-time estimate. It considers the optimistic, most likely, and pessimistic time estimates for each activity to calculate the expected duration and variance.

c. Forward pass method: The forward pass method is a calculation technique used in both CPM and PERT methods. It helps determine the earliest start and finish times for each activity in a project.

d. Backward pass method: The backward pass method is also a calculation technique used in both CPM and PERT methods. It helps determine the latest start and finish times for each activity in a project.

Therefore, the method that uses the 3-time estimate is b. PERT.