Monday, March 4, 2019

Chapter 14 Solutions

ancestors for analyze Problems of Chapter 14 1. a. Given the following diagram for a product, determine the amount of money of from each one chemical element required to assemble one unit of the accurate product. b. Draw a tree diagram for the stapler a. F 2 J 2 x 2 = 4 D 2 x 4 = 8 G 1 L 1 x 2 = 2 J 1 x 2 = 2 H 1 A 1 x 4 = 4 D 1 x 2 = 2 Totals F = 2 G = 1 H = 1 J = 6 D = 10 L = 2 A = 4 b. stapling machine Top fiction Base Assembly Cover Spring curve Assembly Base Strike Pad Rubber Pad 2 Slide Spring 2. The following table lists the components needed to assemble an set aside gunpoint, lead times, and quantities on hand. . b. If 20 units of the end item are to be assembled, how many additional units of E are needed? (Hint You dont need to develop an MRP broadcast to determine this. ) An crop for the end item is scheduled to be ventureped at the start of workhebdomad 11. What is the latest calendar calendar week that the pasture can be started and still be ready to ship o n time? (Hint You dont need to develop an MRP plan for this part either. ) a. B 20 x 2 = 40 10 = 30 E 30 x 2 = 60 12 = 48 C 20 x 1 = 20 10 = 10 E 10 x 2 = 20 finish up Item D 20 x 3 = 60 25 = 35 E 35 x 2 = 70Total 48 + 20 + 70 = 138 b. B(2) C D(3) E(2) F(3) G(2) E(2) H(4) E(2) Total LT 4 5 5 5 6 The longest sequence is 6 weeks. hebdomad 11 6 weeks = Week 5. 5 3. End item P is composed of third subassemblies K, L, and W. K is assembled using 3 Gs and 4 Hs L is made of 2 Ms and 2 Ns and W is made of 3 Zs. On-hand inventories are 20 Ls, 40 Gs, and cc Hs. plan communicate are 10 Ks at the start of week 3, 30 Ks at the start of week 6, and cc Ws at the start of week 3. One one hundred Ps go away be shipped at the start of week 6, and another one C at the start of week 7. fleet times are two weeks for subassemblies and one week for components G, H, and M. Final assembly of P requires one week. Include an extra 10 percent scrap aloneowance in each planned instal of G. The mi nimum give size for H is two hundred units. Develop each of the following a. b. c. d. A product structure tree. An assembly time chart. A master schedule for P. A genuine requirements plan for K, G, and H using lot-for-lot ordering. Solution a. Product Structure Tree P K 3G c. operate Schedule d. Weeks beat LT = 1 wk. Beg. Inv. 1 2 3 4 5 Beg. Inv. 1 2 3 4 5 6 100 6 100 7 100 7 100L 4H 2 2N W 3Z P realize requirements schedule returns intercommunicate on hand take in requirements aforethought(ip)-order improvement be after-order releases K LT = 2 wk. Beg. Inv. 1 2 3 4 100 5 100 10 10 10 10 90 90 90 Beg. Inv. 1 2 3 270 40 40 40 40 230 253 253 231 210 231 70 4 210 5 100 100 100 6 100 30 70 70 100 100 7 unrefined requirements schedule avail intercommunicate on hand wage requirements plotted-order receipts plotted-order releases G(3) LT = 1 wk. 6 7 primitive requirements Scheduled receipts Projected on hand web requirements think-order receipts plotted-order releases H (4) LT = 1 wk. Beg.Inv. 1 2 3 360 4 280 40 240 240 5 6 7 Gross requirements Scheduled receipts Projected on hand Net requirements be after-order receipts Planned-order releases 200 200 200 200 200 160 200 240 4. Oh No , Inc. , sells terce 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 D) to further differentiate the models. D is bought from a domestic producer. Lead times are one week for all items omit C, which is two weeks. in that location are ample supplies of the basic units (E, F, and G) on hand.There are also 10 units of B, 10 units of C, and 25 units of D on hand. Lot-sizing rules are lot-for-lot ordering for all items except D, which must be order in multiples 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 to be produced in week 4, 60 units of B in week 5, and 30 units of C in week 6. Prepare a mate rial requirements plan for D and its parents. Solution assure Schedule Week Quantity Beg. Inv. 1 2 3 4 40A 5 60B 6 30C A LT = 1 wk. Beg. Inv. 1 2 3 4 40 5 6Gross requirements Scheduled receipts Projected on hand Net requirements Planned order receipt Planned order release Beg. Inv. 40 40 40 B LT = 1 wk. 1 2 3 4 5 60 6 Gross requirements Scheduled receipts Projected on hand Net requirements Planned order receipt Planned order release Beg. Inv. 50 10 10 10 10 10 10 50 50 C LT = 2 wks. 1 2 3 4 5 6 30 Gross requirements Scheduled receipts Projected on hand Net requirements Planned order receipt Planned order release D LT = 1 wk. Beg. Inv. 1 2 3 40 100 25 cxxv 125 125 85 95 100 100 5 20 4 180 5 10 10 10 10 10 10 10 20 20 6Gross requirements Scheduled receipts Projected on hand Net requirements Planned order receipt Planned order release 5. Using the diagram below, do the following a. Draw a tree diagram for the scissors. b. Prepare an MRP for scissors. Lead times are one day for each co mponent and terminal scissor assembly, but two days for the plastic grips. Six hundred pairs of scissors are needed on Day 6. Note There are 200 straight blades and 350 bent blades on hand, and 40 make it blade assemblies on hand. Solution. a. cut Bottom weather vane Assembly Screw Top Blade Assembly Straight Blade b. Master Schedule forStraight Plastic mesmerise solidification Blade Bent Plastic Grip Week Quantity Beg. Inv. 1 2 3 4 5 6 600 7 8 Week Scissors (LT = 1 week) Gross requirements Scheduled receipts On hand Net requirements Planned order receipts Planned order releases 600 600 600 Beg. Inv. 1 2 3 4 5 6 600 7 8 Week Bottom Blade Assembly (LT = 1 week) Gross requirements Scheduled receipts On hand Net requirements Planned order receipts Planned order releases 600 600 600 Beg. Inv. 1 2 3 4 5 600 6 7 8 Week Top Blade Assembly (LT = 1 week) Gross requirements Scheduled receipts On hand Net requirements Planned order receipts Planned order releases Beg.Inv. 560 Week Screw (LT = 1 week) Gross requirements Scheduled receipts On hand Net requirements Planned order receipts Planned order releases Week Straight Blade (LT = 1 week) Gross requirements Scheduled receipts On hand Net requirements Planned order receipts 200 200 200 200 200 400 400 Beg. Inv. 1 2 3 4 600 5 6 7 8 600 600 600 1 2 3 4 5 6 600 7 8 40 40 40 40 40 40 560 560 Beg. Inv. 1 2 3 4 5 600 6 7 8 Planned order releases 400 Week Straight Plastic Grip (LT = 2 weeks) Gross requirements Scheduled receipts On hand Net requirements Planned order receipts Planned order releases Beg. Inv. 00 Week Bent Blade (LT = 1 week) Gross requirements Scheduled receipts On hand Net requirements Planned order receipts Planned order releases Bent Plastic Grip (LT = 2 weeks) Gross requirements Scheduled receipts On hand Net requirements Planned order receipts Planned order releases 560 560 560 Beg. Inv. 210 Week 1 2 3 4 560 5 6 7 8 350 350 350 350 350 210 210 1 2 3 4 560 5 6 7 8 600 600 Beg. Inv. 1 2 3 4 600 5 6 7 8 6. Develop a material requirements plan for component H. Lead times for the end item and each component except B are one week. The lead time for B is three weeks. Sixty units of A are needed at the start of week 8.There are currently 15 units of B on hand and cxxx of E on hand, and 50 units of H are in merchandise and will be completed by the start of week 2. Solution Master Schedule Week Quantity Beginnin g stock 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 60 8 A LT = 1 Gross requirements Scheduled receipts Projected on hand Net requirements Planned-order receipts Planned-order releases Beginnin g inventory 1 2 3 4 5 6 60 7 60 60 60 B(2) LT = 3 8 Gross requirements Scheduled receipts Projected on hand Net requirements Planned-order receipts Planned-order releases 105 15 15 15 15 15 15 15 120 15 105 105 C LT = 1Beginnin g inventory 1 2 3 4 5 6 7 8 Gross requirements Scheduled receipts Projected on hand Net requirements Planned-order receipts Planned-order releases 60 60 60 60 E(2) E(4) LT = 1 Beginnin g inventory 1 2 3 4 5 6 7 8 Gross requirements Scheduled receipts Projected on hand Net requirements Planned-order receipts Planned-order releases 80 cxxx 130 130 130 210 240 130 80 80 240 240 240 H(E3) H(E3) LT = 1 Beginnin g inventory 1 2 3 4 5 6 7 8 Gross requirements Scheduled receipts Projected on hand Net requirements Planned-order receipts Planned-order releases 190 50 50 240 720 50 190 190 240 720 720

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