Practical Management Science
6th Edition
ISBN: 9781337406659
Author: WINSTON, Wayne L.
Publisher: Cengage,
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- Schedule the following project by using AON network and perform CPM calculations (ES, EF, LS, LF, TF, FF). Also show the critical path.arrow_forwardSwimming Pool Installation: You are the project manager working for Mack's Pool Co. Your project consists of installing a new swimming pool at the local country club before Memorial Day weekend (pool opening weekend). You would like to find the minimum cost schedule for your project. There is a $9,000 per week penalty for each week the project is delayed beyond week 9. In addition, your project team determined that indirect costs are $15,000 per week. ACTIVITY Immediate Predecessor (s) NORMAL TIME (NT) CRASH TIME (CT) Normal Cost (NC) Crash Cost (CC) A -- 2 1 7,000 10,000 B -- 2 2 3,000 3,000 C A 3 1 12,000 40,000 D B 3 2 12,000 28,000 E C 1 1 8,000 8,000 F D, E 5 3 5,000 15,000 G E 3 2 9,000 18,000 Before crashing, the project duration is _________ week(s). The total cost of the project if we do nothing is $ __________ (round to the nearest dollar). The minimum cost…arrow_forwardThe estimated times and immediate predecessors for the activities in a project at Howard Umrah's retinal scanning company are given in the following table. Assume that the activity times are independent. Passenger miles flown on Northeast Airlines, a commuter firm serving the Boston hub, are shown for the past 12 weeks: Week 1 2 3 4 5 6 7 8 9 10 11 12 Actual Passenger Miles (in thousands) 18 21 20 23 20 18 22 20 23 22 13 23 Part 2 a) Assuming an initial forecast for week 1 of 18,000 miles, use exponential smoothing to compute miles for weeks 2 through 12. Use α = 0.25 (round your…arrow_forward
- To design a new app, a project manager has gathered the time information foreach activity as shown in the following table:Activity Predecessors Optimistic Most Likely PessimisticA / 1 4 7B / 2 6 10C B 3 3 9D A 6 13 14E A, C 4 6 14F B 6 8 16G D,E,F 2 5 8Identify the critical path. How much slack time is associated with each noncritical activity?Suppose you wanted to have 99% confidence in the project finishing on time. How manyweeks in total would your project team need to achieve this 99% likelihood?arrow_forwardPlease help with (b) and (c) as both answers given were incorrect! Please need correct answers. Blue Lagoon is a contractor that installs residential swimming pools, projects that consist of nine major activities. The activities, their immediate predecessors, and the activity time estimates (in days) are shown. Activity Immediate Predecessor Optimistic Most Probable Pessimistic A 3 5 6 B 2 4 6 C A, B 6 7 8 D A, B 8 10 11 E B 2 4 6 F C 1 2 3 G D 6 10 12 H D, F 7 9 11 I E, G, H 3 4 5 (a) What are the critical activities? (Enter your answers as a comma-separated list.) $$A, D, G, I (b) What is the expected time (in days) to complete the project? (Round your answer to two decimal places.) (c) Based only on the critical path, what is the estimated probability that the project can be completed in 28 or fewer days? (Round your answer to four decimal places.)arrow_forwardDevelop a CPM diagram for the activities/relationships listed below (assumedurations are in months). For each activity calculate the Early Start, Late Start, EarlyFinish, Late Finish, Total Float, and Free Float. Clearly identify the critical path forthe project (hint: a highlighter would be a good tool to use) How do you solve this? I don't understand how it's done.arrow_forward
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