An electric utility is planning its annual project of shutting down one of its steam boilers for maintenance and repair. An analysis of this project has identified the following principal activities and their expected times and relationships.

a. Prepare a project network diagram.

b. Calculate the scheduling times and total slack for each activity.

c. List the critical path activities and project duration.

d. Assuming that one worker is required for each activity, prepare a resource-leveled schedule. What is the maximum number of workers required to finish the project on time?

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Time, Days 4 Activity Immediate Predecessor 4 4 A,B,F E,G,H