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# Homework 1, Supply Chain and Operations Management Due on 1/29/2013 Problem 1 Page 100, Problem 1 Operations No. of equipment Capacity (by...

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Homework 1, Supply Chain and Operations Management Due on 1/29/2013 Problem 1 Page 100, Problem 1 Operations No. of equipment Capacity (by equipment), units/hr Planned Utilization (overall) A 1 400 80% B 4 100,80,150,125 77% C 1 350 95% D 2 190,235 72.5% With the process information provided in the preceding table, when the sequence of flow is A B (any machine can be used if available) C D (any machine can be used if available), calculate the overall flow rate for: a. Maximum capacity b. Effective capacity Problem 2 Page 102 Problem 8 New Time Videos (NTV) is a new online video rental service. In the field, it is trying to compete by offering its customers access to all of the major new video releases in one business day. That is, if you order a video from NTV, you can expect it in one business day from the time when you placed the order. When you are done with the video, you simply drop it in the prepaid mailing envelope and return it. All videos arrive in a sorting facility located in the Midwest where envelopes with the videos are opened, checked (right video with the right sleeve, no scratches, no cracks, no dirt on the videos), and made ready to be sent out again. As the manager of this facility, your goal is to turn the returned videos around in 6 hours (a shift is 8 hours long). You have the following information: Inventory of videos: 450,000 per shift Throughput: 325,000 per shift a. Calculate the expected average flow time (hint: Use Little’s Law). b. What changes would you recommend to meet the goal of processing a returned video within 6 hours? Problem 3 Page 101 Problem 7 Spartan Redi-Care is a small urgent care facility located near the University. Because of the high competition for student business, the manager of Spartan has decided that the most effective way of competing is to emphasize short wait times. Spartan Redi-Care has even gone so far as to adopt the slogan, “Get in, Get better, Get out.” As the facility manager, you have decided that this slogan translates into an average customer wait time of 30 minutes. You have collected the following data taken from a three week period of typical demand: c a = 3 c p = 1 u= 70 percent t p = 6 minutes a. What is the expected average waiting time for Spartan Redi-Care? b. If the expected average waiting time is greater than what you have promised, what are some actions that you could introduce to correct this imbalance (be specific)? Problem 4
Page 153 Problem 2 Given the FMEA data provided in the table below: a. What is the RPN for each failure cause? b. Which failure cause would be of least concern? c. Which failure cause would be of greatest concern? d. For the failure of greatest concern, would your recommended action be aimed at reducing failure severity, occurrence, or undetectability? On what other information would your answer depend? Failure Cause Severity Occurrence Undetectability M 5 2 1 N 3 4 9 X 2 2 3 Y 7 3 2 Z 9 1 5

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