(a) Given the data below for a small pipeline project, based on a PERT analysis what is the expected project duration? (b) What is the probability of completing this project in 120 days or less? Activity Description Successor Start 2 Lead Time Move to Site 10 10 10 3, 4, 5 22 100 3 18 20 20 Obtain Pipes Obtain Valves Lay Out Pipeline Dig Trench Prepare Valve Chambers Cut Specials Lay Pipes Fit Valves 30 20 8, 9, 10 5 18 70 11 7 8, 10 14 20 25 60 17 18 31 11 9. 17 11 10 18 20 46 12 11 10 12 13, 14 13, 14, 15 17 12 Concrete Anchors 12 8 11 13 13 Finish Valve Chambers 14 Test Pipeline Backfill Cleanup Leave Site 5 6 7 16 20 10 15 8 10 16 16 3 17 17 3 4 5

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Management levels

Management levels are the hierarchy of all the designations of people present in a construction company or construction project. For the proper execution of the project, all the components of a management hierarchy must work properly as per their responsibility. The main objective of creating management levels is that the whole work should be distributed in parts to the respective departments of specialization in that part.