The demand for subassembly S is 90 units in week 7 Each unit of 5 requires 1 unit of T and 1 unit of U. Each unit of T requires 1 unit of V, 1 unit of W, and 2units of X. Finally, each unit of U requires 1 unit of Y and 3 units of Z. One firm manufactures all dems. It takes 2 weeks to make S, 2 weeks to make T, 2 weeksto make U, 2 weeks to make V, 2 weeks to make W, 1 week to make X 2 weeks to make Y, and 2 weeks to make ZClick the icon to view the product structure and the time-phased product structureIn addition to 90 units of S, there is also a demand for 20 units of U, which is a component of S. The 20 units of U are needed for maintenance purposesThese units are needed in week 6. Modify the gross material requirements plan to reflect this change (type 0 if the input box is not used)ItemSTUVWXYGross reqOrder releaseGross reqOrder releaseGross reqOrder releaseGross roqOrder releaseGross reqOrder releaseGross reqOrder releaseGross reqOrder releaseE2TP3BEWeek45 67Lead Time(weeks)221222

Gross requirementThe gross requirement is the total demand expected for an item in a particular…

Answered: The demand for subassembly S is 90…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter4: Linear Programming Models

Section: Chapter Questions

Problem 111P

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The demand for subassembly Sis 100 units in week 7.Each unit ofS requires 1 unit ofT and 2 units ofU. Each unit ofT requires I unit ofY, 2 units ofW, and 1 unit of X. Finally, eachunit of U requires 2 units of Y and 3 units of Z. One firm manufacturesall items. It takes 2 weeks to make S, 1 week to make T, 2 weeks to make U, 2 weeks to make Y, 3 weeks to make W,I week to make X, 2 weeks to make Y, and I week to make Z.a) Construct a product structure. Identify all levels, parents, and components.b) Prepare a time-phased product structure.
Each A (finished product) requires 1 of component B and 2 of component C. Each B requires 2 of part D and 1 of part E and each C requires 1 of part D and 1 of part F.If the demand for product A is 50 units., and there are 15 units of B on hand and 50 units of C, how many units of Part D will be needed?
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
Each A (finished good) requires 1 of component B and 2 of component C. Each B requires 2 of part D and 1 of part E; and each C requires 1 of part D and 1 of part F. If the demand for product A is 30 units, and there are 10 units of B on hand and none of C, how many units of part D will be needed?
Oh No!, Inc., sells three models of radar detector units. It buys the three basic models (E, F, and G)from a Japanese manufacturer and adds one, two, or four lights (component DLead times are one week for all items except C, which is two weeks. There are ample suppliesof the basic units (E, F, and G) on hand. There are also 10 units of B, 10 units of C, and 25 units ofD on hand. Lot-sizing rules are lot-for-lot ordering for all items except D, which must be ordered inmultiples of 100 units. There is a scheduled receipt of 100 units of D in week 1.The master schedule calls for 40 units of A in week 4, 60 units of B in week 5, and 30 units of Cin week 6. Prepare a material requirements plan for D and its parents) to further differentiate the models. D is bought from a domestic producer.
One 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.
1. Aljon, a softdrink dealer, delivers 14 cases on Monday, 10 cases on Tuesday, 12 cases on Wednesday, 15 cases on Thursday, 19 cases on Friday, and 20 cases on Saturday. How many cases are delivered on the average each day?
Item STUVWX>N Y 2. The demand for assembly S is 100 units and it is due in Week 15. Each unit of S requires one unit of T and 0.5 units of U. Each unit of T requires one unit of V, two units of W, and one unit of X. Finally, each unit of U requires 0.5 units of Y and three units of Z. Z Item S T U V W X Y Z a) Calculate the planned orders for all the items. b) Use time phasing to determine an overall schedule. S OH Gross Requirements Inv 100 20 20 10 30 30 15 25 10 2 1 1 1 2 2 1 Lead Time Due Date (weeks) (week) 15 1 T W (2) X Net Requirements Release Date U (0.5) Y (0.5) Planned Order Z (3) Lot Size Policy L4L X10 X5 Min 50 F100 X50 F100 Min 100
Problem 9-11 (Algo) Assume that Product Z is made of two units of A and three units of B. A is made of three units of C and four of D. D is made of two units of E. Lead times for purchase or fabrication of each unit to final assembly are: Z takes two weeks; A, B, C, and D take one week each; and E takes three weeks. Fifty five units of Product Z are required in Period 10. (Assume that there is currently no inventory on-hand of any of these items.) b. Develop an MRP planning schedule showing gross and net requirements and order release and order receipt dates. (Leave the cells blank, whenever zero (0) is required.) Item: Z OH: 0 LT: 2 SS: 0 Q: L4L Item: A OH: 0 LT: 1 SS: 0 Q: L4L Item: B OH: 0 LT: 1 SS: 0 Q: L4L Period: Gross requirements Scheduled receipts Projected available balance Net requirements Planned order receipts Planned order releases Gross requirements Scheduled receipts Projected available balance Net requirements Planned order receipts Planned order releases Gross…
Operations Manager of PT Radio Gaga is calculating production costsa telecommunication radio taking into account the following needs:i. Week 1 : 20 unitsii. Week 2 : 36 unitsiii. Week 3 : 46 unitsiv. Week 4 : 45 unitsv. Week 5 : 20 unitsvi. Week 6 : 26 unitsIt is known that there is inventory from the previous week as many as 20 units. Assuming 52week per year, lead time booking for 1 week, setup cost of $40 andholding cost of $0.75 per week, you are required to assist the Operations Manager of PTRadio Gaga to calculate the estimated production cost as follows: a. Calculate EoQ b. Create a 6-week MRP Lot Sizing Table with EoQ method c. Calculate Total Production Cost using EoQ method d. Create a 6-week MRP Lot Sizing Table using the Lot methodfor Lot e. Calculate Total Production cost by using Lot for Lot methodF. Which method will PT Radio Gaga's Operations Manager take?
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.
3. The large parts of a playground A-frame (from which to hang a swing or glider) consist of a ridge pole, four legs, and two side braces. Each leg fastens to the ridge with one fastener set. Each side brace requires two fastener sets for attachment to the legs. There is one order outstanding, to make 180 frame kits. There are 500 legs and 20 ridge poles in inventory. There are no other large items in inventory, and no scheduled receipts. (a) Draw the product structure tree. (b) Calculate the net requirements to fulfill the outstanding order.

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