15 10 H 11. Determine mater reuirements plans for parts N and V and subassembly I as described in a. Assume that c are currently 100 Ns on hand and scheduled receipts of 40 Is and 10 Vs at b. Assume on-ha and scheduled receipts as in part a. Now suppose that 100 Es are needed at Solved Problem i cach of the following: the beginning of wock 3. No Es are on hand; 120 Es are needed at the start of week 5. the start of week S and 55 at the start of week 7. Also, use multiples of these order sizes: N, 800; V, 200. Liog loc-for-lot ordering for I. Using your answer to part b, update the MRP for V, using the following additional information for each of the se cases: (1) one week has elapsed (making it the start of week 2), and (2) three weeks have elapsed (making it the start of week 4). The updated master schedule now has an order for 100 units of E in week 9. Your plan should cover weeks 2 through 9 for case 1, and weeks 4 through 11 for case 2. Assume all orders are released and received as planned. с. 12. A firm that produces electric golf carts has just received an order for 200 carts, which must be ready for delivery at the start of week 8. Information concerning the product structure, lead times, and quantities on hand is shown in the following table. Use this information to do each of the following: a. Construct a product tree. b. Construct an assembly time chart. C. Develop a material requirements plan that will provide 200 golf carts by week 8 assuming lot-for-lot ordering. Quantity on Hand Lead Time Parts List for Electric Golf Cart 0 1 Electric golf cart 40 1 Top 200 1 Supports (4) 0 1 Cover 20 1 Base 300 2 Motor 50 3 Body 35 1 Frame 0 1 240 Controls 1 Wheel assemblies (4) Seats (2) 120 2 13. Refer to Problem 12. Assume that unusually mild weather has caused a change in the quantity and timing of orders for golf carts. The revised plan calls for 100 golf carts at the start of week 6, 100 at the start of week 8, and 100 at the start of week 9. a. Develop a master schedule for this revised plan. nity for assembling bases to 50 units dates ntities for orders for tops and bases. OPERATIONS MANAGEMENT D irteenth Edition WILLIAM J. STEVENSON 63