BUS 330.001/AW/WW Fall 2019: Explain the applications and benefits of using MRP with respect to different firm types 2. A car manufacturer buys brakes from a supplier. The following data was provided by the supplier for the car manufacturer to set up a control chart to manage the irregularities. Develop a c-chart for 99.7% confidence. Based on the plotted data points, what comments can you make? (10 points). Sample 1 2 3 4 5 6 7 8 9 10 Irregularities 2 4 7 3 3 6 5 2 3 4 3. Assume that Product Z is made of two units of A and four units of B. A is made of three units of C and four of D. D is made of two units of E. Prepare both the bill of materials(BOM) and the indented parts list. (10 points). 4. Referring to question 4, if 50 units of Z are needed in week 10 (this is gross requirement), prepare MRP tables for the product and all components involved. (20 points) Z OH = 0 LT=2 wk SS=0 Q=L4L A OH = 0 LT=1 wk SS=0 Q=L4L B OH = 0 LT=1 wk SS=0 Q=L4L C OH = 0 LT=1 wk SS=0 2 Q=L4L D OH = 0 LT=1 wk SS=0 Q=L4L E OH = 0 LT=3 wk SS=0 Q=L4L 5. C-Spec, Inc., is attempting to determine whether an existing machine is capable of milling an engine part that has a key specification of 4 ± .003 inches. After a trial run on this machine, C-Spec has determined that the machine has a sample mean of 4.001 inches with a standard deviation of .002 inch. (10 points) (a) Calculate the Cpk for this machine (b) Should C-Spec use this machine to produce this part? Why? 6. What is process capability? Explain the difference between specification limits and process limits. Consider a process with lower process control limit as 1.335 and upper process control limit as 1.345. The lower specification limit is 1.338 and upper specification limit is 1.342. Using a diagram, comment on whether the process is capable of meeting requirements. (10 points) 7. Each unit of A is composed of one unit of B, two units of C, and one unit of D. C is composed of two units of D and three units of E. Items A, C, D, and E have on-hand inventories of 20, 10, 20, and 10 units, respectively. Item B has a scheduled receipt of 10 units in Period 1, and C has a scheduled receipt of 50 units in Period 1. Lot-for-lot (L4L) lot sizing is used for Items A and B. Item C requires a minimum lot size of 50 units. D and E are required to be purchased in multiples of 100 and 50, respectively. Lead times are one period for Items A, B, and C, and two periods for Items D and E. The gross requirements for A are 30 in Period 2, 30 in Period 5, and 40 in Period 8. Find the planned order releases for all items. (20 points). 8. You get 10 points free for attempting this assignment. (10 points).
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