Questions 1: Indicate the following statements are true or false, and explain why each is true or false
A. It is necessary to minimize setup times to use the mixed-model production
B. Increasing the capacity of any workstation in a production line leads to higher throughput
C. The natural variability in production lines can be due machine failures and the operators performance
D. The mean time to repair a machine is more important in analyzing the variability than the mean time to fail
E. Similar production lines producing the same products can have the same throughput with different levels of WIP
F. The bottleneck station always has the longest processing time
G. The amount of variability in processing times cause the cycle time to increase and the throughput to decrease
H. The practical worst case performance level is the optimum level of performance that is used to evaluate the actual performance of the line and it is fixed when the amount of work in process is changed
I. The push production system promotes larger work in process levels
J. Non-preemptive stops of the machines are not random occurrences
K. Steady state concept is important in the queueing analysis ?
Question 2: answer the following questions
A. Explain the value of the concept of heijunka in achieving the goals of the JIT system.
B. Discuss the most important necessary pre-requisite to implement heijunka and mixed model production.
C. Describe the differences between the utilization of a machine and the availability of the machine.
D. Explain the meaning of the work-in-process, and why it is an important element in analyzing the production lines.
E. In analyzing a production line, it was found that the THPWC = 21 units per day and the CTPWC = 7.25 hours. Explain the meaning of those values.
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