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Normal Time 12 weeks 23 weeks 15 weeks 27 weeks 18 weeks 6 weeksĬrash Time 9 weeks 18 weeks 12 weeks 21 weeks 14 weeks 4 weeks Sharon now has gathered the data needed to apply this method, as given below.
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#PERT POM QM HOW TO#
Therefore, to make it virtually certain that the deadline will be met, she has decided to crash the project, using the CPM method of time-cost tradeoffs to determine how to do this in the most economical way. What does this answer say about the accuracy of the standard procedure used in part (d)? Now, Sharon Lowe is concerned that there is a significant chance that the vitally important deadline of 57 weeks will not be met. Therefore, the approximate probability that the project will finish within 57 weeks is the product of the probabilities found in parts (d) and (e). The project will finish within 57 weeks if both f) Since these paths do not overlap, a better estimate of the probability that the project will finish within 57 weeks can be obtained as follows. Find the approximate probability that this path will be completed within 57 weeks. e) Now consider the other path through the project network. Which of the paths is a critical path? d) Use the mean critical path to find the approximate probability that the advertising campaign will be ready to launch within 57 weeks. b) Construct the project network for this project (make it in horizontal way).Ĭ) Find the earliest times, latest times, and slack for each activity. Pessimistic Estimate 12 weeks 39 weeks 18 weeks 36 weeks 24 weeks 14 weeksĪ) Find the estimate of the mean and variance of the duration of each activity. Most Likely Estimate 12 weeks 21 weeks 15 weeks 27 weeks 18 weeks 5 weeks Optimistic Estimate 12 weeks 15 weeks 12 weeks 18 weeks 12 weeks 2 weeks Using the PERT three-estimate approach, Sharon has obtained the following estimates of the duration of each activity. Considering the order in which these activities need to occur, she also has constructed the following project network table. Sharon has identified the six activities (labeled A, B. She wants the project completed within 57 weeks in time to launch the advertising campaign at the beginning of the Christmas season. Finally, recommendations are offered on ways to effectively integrate MS tools in designing, managing, and improving operations in small firms.Case PERT/CPM Sharon Lowe, vice president for marketing for the Electronic Toys Company, is about to begin a project to design an advertising campaign for a new line of toys. Further support for these linkages is provided through a discussion of three actual applications of prominent MS techniques in small organizations. This article highlights specific linkages of MS techniques to various dimensions of operations management in small firms. Hence, there is a misconception that advanced MS techniques do not have a prominent role in operations improvement efforts, particularly for small firms.
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Also, traditionally, MS applications have been implemented in large firms by MS staff specialists. Management science (MS) techniques, such as linear programming, critical path scheduling, and simulation, generally have not been integrated with QM techniques during operations and quality improvement efforts. Abstract : During the past decade researchers and practitioners have paid great attention to conventional quality management (QM) techniques as primary operations improvement tools.