Operations Management
13th Edition
ISBN: 9781259667473
Author: William J Stevenson
Publisher: McGraw-Hill Education
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Chapter 12, Problem 6P
A table is assembled using three components, as shown in the accompanying product structure tree. The company that makes the table wants to ship 100 units at the beginning of day 4, 150 units at the beginning of day 5, and 200 units at the beginning of day 7. Receipts of 100 wood sections are
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A table is assembled using three components, as shown in the accompanying product structure tree.The company that makes the table wants to ship 100 units at the beginning of day 4, 150 units atthe beginning of day 5, and 200 units at the beginning of day 7. Receipts of 100 wood sections arescheduled at the beginning of day 2. There are 120 legs on hand. There are 60 braces on hand. Leadtimes (in days) for all items are shown in the following table. Prepare a material requirements planusing lot-for-lot ordering.
Product PI is made of one unit of sub assembly A and four
units of sub assembly B. Sub assembly A is made of 4 units
of component X while sub assembly B is made of 2 units of
X. one unit of Y and 3 units of Z. The manufacturing lead
times PI, A, B, X, Y and Z are 1, 1, 1, 4, 6 and 1 (week)
respectively. The lead time for delivery of PI in weeks
is
Eighty units of end item E are needed at the beginning of week 6. Three cases (30 units per case) of Jhave been ordered and one case is scheduled to arrive in week 3, one in week 4, and one in week 5.Note: J must be ordered by the case, and B must be produced in multiples of 120 units. There are 60 unitsof B and 20 units of J now on hand. Lead times are two weeks each for E and B, and one week for J.E
a. Prepare a material requirements plan for component J.b. Suppose that in week 4 the quantity of E needed is changed from 80 to 70. The planned-order releasesthrough week 3 have all been executed. How many more Bs and Js will be on hand in week 6?
Chapter 12 Solutions
Operations Management
Ch. 12.11 - What is ERP?Ch. 12.11 - What are the three main reasons firms adopt ERP?Ch. 12.11 - What are some hidden costs of ERP?Ch. 12.11 - How does ERP fit with e-commerce and supply chain...Ch. 12 - Contrast independent and dependent demand.Ch. 12 - When is MRP appropriate?Ch. 12 - Briefly define or explain each of these terms: a....Ch. 12 - Prob. 4DRQCh. 12 - Prob. 5DRQCh. 12 - What is meant by the term safety time?
Ch. 12 - Prob. 7DRQCh. 12 - Briefly discuss the requirements for effective...Ch. 12 - Prob. 9DRQCh. 12 - How can the use of MRP contribute to productivity?Ch. 12 - Prob. 11DRQCh. 12 - What is lot sizing. what is its goal, and why is...Ch. 12 - Contrast planned-order receipts and scheduled...Ch. 12 - If seasonal variations are present, is their...Ch. 12 - Prob. 15DRQCh. 12 - What are some unforeseen costs of ERP?Ch. 12 - What trade-offs are involved in the decision to...Ch. 12 - Who in the organization needs to be involved in...Ch. 12 - Prob. 3TSCh. 12 - Prob. 1CTECh. 12 - Give one example of unethical behavior involving...Ch. 12 - a. Given the following diagram for a product,...Ch. 12 - Prob. 2PCh. 12 - Prob. 3PCh. 12 - Eighty units of end item E are needed at the...Ch. 12 - a. One hundred twenty units of end item Z are...Ch. 12 - A table is assembled using three components, as...Ch. 12 - Eighty units of end item X are needed at the...Ch. 12 - Oh No!, Inc., sells three models of radar detector...Ch. 12 - Assume that you are the manager of a shop that...Ch. 12 - Assume that you are the manager of Assembly, Inc....Ch. 12 - Determine material requirements plans for pans N...Ch. 12 - A firm that produces electric golf carts has just...Ch. 12 - Refer to Problem 12. Assume that unusually mild...Ch. 12 - Using the accompanying diagram, do the following:...Ch. 12 - A company that manufactures paving material for...Ch. 12 - Prob. 16PCh. 12 - The MRP Department has a problem. Its computer...Ch. 12 - Develop a material requirements plan for component...Ch. 12 - How many wheels sets should the manager order?Ch. 12 - When should the wheel sets be ordered?Ch. 12 - Prob. 2.1CQCh. 12 - Prob. 1OTQCh. 12 - Prob. 2OTQCh. 12 - Suppose the company has just received an order for...Ch. 12 - Prob. 4OTQCh. 12 - Prob. 5OTQ
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- 2)The castings need to be started in week ? (enter your response as a whole number).arrow_forwardAssume that you are the manager of Assembly, Inc. You have just received an order for 25 units of an industrial robot, which is to be delivered at the start of week 7 of your schedule. Using the following information, determine how many units of subassembly G to order and the timing of those orders, given that subassembly G must be ordered in multiples of 80 units and all other components are ordered lot-for-lot. Assume that the components are used only for this particular robot. Item Lead Time (weeks) On Hand Components Robot 2 10 B, G, C(3) B 1 5 E, F C 1 20 G(2), H E 2 4 — F 3 8 — G 2 15 — H 1 10 — Subassembly G order quantity (in units) Subassembly G should start at beginning of Week (Click to select) 1 2 3 4arrow_forwardAssume that you are the manager of Assembly, Inc. You have just received an order for 26 units of an industrial robot, which is to be delivered at the start of week 7 of your schedule. Using the following information, determine how many units of subassembly G to order and the timing of those orders, given that subassembly G must be ordered in multiples of 80 units and all other components are ordered lot-for-lot. Assume that the components are used only for this particular robot. Item Lead Time (weeks) On Hand Components Robot 2 10 B, G, C(3) B 1 5 E, F C 1 20 G(2), H E 2 4 — F 3 8 — G 2 15 — H 1 10 — Subassembly G order quantity (in units) Subassembly G should start at beginning of Weekarrow_forward
- One unit of A is made of two units of B and one unit of C. B is made of three units of D and one unit of F. C is composed of three units of B, one unit of D, and four units of E. D is made of one unit of E. Item C has a lead time of one week; items A, B, E, and F have two-week lead times; and item D has a lead time of three weeks. Lot-for-lot (L4L) lot sizing is used for items C, E, and F; lots of size 20, 40, and 160 are used for items A, B, and D, respectively. Items A, B, D, and E have on-hand (beginning) inventories of 5, 10, 100, and 100, respectively; all other items have zero beginning inventories. We are scheduled to receive 10 units of A in week 3, 20 units of B in week 7, 40 units of F in week 5, and 60 units of E in week 2; there are no other scheduled receipts. If 20 units of A are required in week 10, use the low-level-coded bill-of-materials (product structure tree) to find thenecessary planned order releases for all components.arrow_forwardOne unit of A is made of two units of B and one unit of C. B is made of three units of Dand one unit of F. C is composed of three units of B, one unit of D, and four units of E.D is made of one unit of E. Item C has a lead time of one week; Items A, B, E, and F havetwo-week lead times; and Item D has a lead time of three weeks. Lot-for-lot (L4L) lot sizingis used for Items C, E, and F; lots of size 20, 40, and 160 are used for Items A, B, andD, respectively. Items A, B, D, and E have on-hand (beginning) inventories of 5, 10, 100,and 100, respectively; all other items have zero beginning inventories. We are scheduledto receive 10 units of A in Week 3, 20 units of B in Week 7, 40 units of F in Week 5, and60 units of E in Week 2; there are no other scheduled receipts. If 20 units of A are requiredin Week 10, use the low-level-coded bill-of-materials (product structure tree) to i nd thenecessary planned order releases for all components.arrow_forwardThe assembly department started the month with 468,000 units in its beginning work in process inventory. An additional 1,524,000 units were transferred in from the prior department during the month to begin processing in the Assembly Department. There were 126,000 units in the ending work in process inventory of the Assembly Department. How many units were transferred to the next processing department during the month? a. 1,992,000 b. 1,992,000 c. 2,118,000 d. 1,866,000 e. 1,398,000 f. 1,182,000arrow_forward
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