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PROJECT SCHEDULING BASED ON UNCERTAIN ACTIVITY TIMES ACTIVITY LIST FOR ABC COMPANY PROJECT WITH OPTIMISTIC, MOST PROBABLE, AND PESSIMISTIC ACTIVITY TIME ESTIMATES (in weeks) Activity Description Immediate Predecessor Optimistic Most Probable Pessimistic (b) EL 4 12 B 1 1.5 5 A 2 3 4 D 3 4 11 E 2 3 4 Develop product design Plan market research Prepare routing Build prototype model Prepare marketing brochure Prepare cost estimates Do preliminary product testing Complete market survey Prepare pricing and forecast report Prepare final report F 1.5 2 2.5 G D 1.5 3 4.5 H BE 2.5 3.5 7.5 1 H 1.5 2 2.5 J F, G, 1 2 3 What is the probability that the project can be completed within 20 weeks? What is the probability that the project can be completed within 15 weeks