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MGMT 405 Operations and Production Management
Answer set 6
(Reference chapters 15– William J. Stevenson-2007, ninth edition)
Discussion Questions
1. Explain briefly how JIT systems differ from traditional production systems?
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2. What is the ultimate goal of a JIT system? What are the supporting goals? What are the building blocks?
3.
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4. Briefly describe the philosophy that underlines JIT.
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5. What are some of the main obstacles that must be overcome in converting from a traditional system to JIT?
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6. What is the Kanban aspect of a JIT system?
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7. Contrast push and pull methods of moving goods and materials through production system.
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8. What are the main benefits of a JIT system?
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9. What are the benefits and risks of small lot sizes?
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Problems
1. A manager wants to determine the number of containers to use for incoming parts for a Kanban system to be installed next month. The process will have a usage rate of 80 pieces per hour. Because the process is new, the manager has assigned an inefficiency factor of 0.35. Each container holds 45 pieces and it takes an average of 75 minutes to complete a cycle .
ANS:
a) How many containers should be used?
N = Total number of containers=?
D = 80 pieces per hour
T = 75 min.=1.25 hour.
X = 0.35
C = 45
b) Will more or fewer containers be required as the system improves? Why?
Neither more nor fewer will be requried as system improves. The calculated figures shows that number of containers should be exactly three. No need to rounding up which will cause the system to be looser or rounding down which will cause the system to be tighter.
2. A JIT system uses Kanban cards to authorize movement of incoming parts. In one portion of the system , a work center uses an average of 100 parts per hour while running. The manager has assigned an inefficiency factor of...