chapter9solutions

chapter9solutions - CHAPTER 9 DISCUSSION QUESTIONS 4. (a)...

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CHAPTER 9 DISCUSSION QUESTIONS 4. (a) The advantages of a product layout are: n The use of special purpose equipment can make the overall process more efficient n Individual workloads can usually be made to be relatively equivalent n It usually results in low variable cost per unit n It tends to keep material handling costs relatively low n It reduces work-in-process inventories n It makes training and supervision easier than with other layout strategies (b) The disadvantages are: n High volume is required because of the large investment needed to set-up the process n Work stoppage at any point ties up the whole operation n There is a lack of flexibility in handling a variety of products or production rates 5. (a) The advantages of a process layout are: n It can simultaneously handle a wide variety of products or services, especially in terms of “batches” or “job lots” n It has considerable flexibility with respect to equipment and labor assignments (b) The disadvantages of a process layout are: n The use of general purpose rather than special purpose equipment tends to make the overall process somewhat less efficient n Orders take more time and money to move through the system because of the difficult scheduling, setting up the process for a wide variety of orders, and considerable material handling n Labor skill requirements tend to be high because of the use of general purpose equipment n Work-in-process inventories tend to be high 6. The advantages of work cells are: n Reduction in work-in-process inventory n Reduction in required floor space n Reduced raw material and finished goods inventory n Reduced direct labor cost n Heightened sense of employee participation n Increased utilization of equipment and machinery n Reduced investment in machinery and equipment The disadvantages are: n Similar to a product layout n High volume is required because of the large investment needed to set-up the process n There is a lack of flexibility in handling a variety of products or production rates n Requires the use of group technology n Requires a high level of training and flexibility on the part of employees n Either considerable staff support or imaginative employees are needed for the initial development of the work cells 17. A heuristic is a “rule of thumb” method of problem solving. Line balancing heuristics include: longest task time, most following tasks, ranked positional weights, shortest task time, and least number of following tasks. END-OF-CHAPTER PROBLEMS 9.1 Interstation Activity Matrix Chapter 9: Layout Strategy 1
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Pickup Pickup Verification Paperwork Advising Class of Status and Forms Station Cards and Payment (A) (B) (C) (D) Paperwork/Forms (A) 0 450 550 50 Advising (B) 250 0 200 0 Class Cards (C) 0 0 0 750 Verification/Payment (D) 0 0 0 0 Interstation Distance Matrix-Original Layout Pickup Pickup Verification Paperwork Advising Class of Status and Forms Station Cards and Payment (A) (B) (C) (D) Paperwork/Forms (A) 0 30 60 90 Advising (B) 30 0 30 60 Class Cards (C) 60 30 0 30 Verification/Payment (D) 90 60 30 0 Load × Distance A B : 450
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chapter9solutions - CHAPTER 9 DISCUSSION QUESTIONS 4. (a)...

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