Assume you are managing a manufacturing line consisting of two workstations: Decambering and Hemming. The mean effective process time of the first machine is 15 minutes and its coefficient of variation is 1 (i.e., exponential distribution). The second machine has the same coefficient of variation, but this machine takes 14 minutes to process a part.

(a) If there is an infinite buffer between the machines, compute the expected WIP, CT, and TH.

WIP: _________ TH: _________ CT: _________

(b) Now assume that there is enough space for only 3 parts between the machines (Hint: the buffer size, b, is 3.) Recompute the expected WIP, CT, and TH. Compare with Part a.

WIP: _________ TH: _________ CT: _________

(c) Now suppose that the decambering's mean effective process time is 14 minutes and hemming's mean effective process time is 15 minutes. However, their coefficient of variation is still 1. Recompute the expected WIP, CT, and TH. Compare with Part b.

WIP: _________ TH: _________ CT: _________

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