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Aggregate Planning IE 314: Operations Management KAMAL Lecture 7.

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Presentation on theme: "Aggregate Planning IE 314: Operations Management KAMAL Lecture 7."— Presentation transcript:

1 Aggregate Planning IE 314: Operations Management KAMAL Lecture 7

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3 EXERCISE (cont’d) Plan A Production (Result of PreviousInventoryStockoutHireLayoffPersonnel PeriodDemandMonth)(Units) Cost 1 (Jan)1,4001, $15,000  (cost to go from 1,600 in Jan to 1,400 in Feb) 2 (Feb)1,6001, ,000  (cost to go from 1,400 in Feb to 1,600 in Mar) 3 (Mar)1,8001, ,000 4 (Apr)1,800 — 5 (May)2,2001, ,000 6 (June)2,200 — 7 (July)1,8002, ,000 8 (Aug)1,4001, ,000  (cost to go from 1,800 in August to 1,400 in Sept) 1,800$400Total $100Personnel Cost: =$36,000=$40,000

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5 EXERCISE 13.4 Plan B PeriodDemandProductionEnding Inv.Subcon (Units)Extra Cost , —$4,000 21,6001,400 0 —— 31,8001, ,000 41,8001, ,000 52,2001, ,000 62,2001, ,000 71,8001, ,000 81,400 0 — Total Extra Cost: $214,000

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7 EXERCISE 13.5 Plan C PeriodDemandProduction*Ending Inv.Stockouts (Units)Extra Cost ,4001,775575$11,500 21,6001, ,000 31,8001, ,500 41,8001, ,000 52,2001, ,500 62,2001, ,000 71,8001, ,500 81,4001, ,500 Total Extra Cost: $85,500

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9 EXERCISE 13.6 Plan D Reg.O.T.End Inv.StockoutsExtra PeriodDemand(Units) Cost ,4001,600—400$8,000 21,600 —4008,000 31,8001,600—2004,000 41,8001,600——0 52,2001,600320—28044,000 62,2001,600320—28044,000 71,8001,600200—10,000 81,4001,600—2004,000 Total Extra Cost: $122,000

10 EXERCISE 13.6 Reg.O.T.End Inv.StockoutsExtra PeriodDemand(Units) Cost ,4001,600—400$8,000 21,600 —4008,000 31,8001, ,600 41,8001, ,000 52,2001, ,400 62,2001,600320—16032,000 71,8001,600200—10,000 81,4001,600—2004,000 Total Extra Cost: $114,000

11 EXERCISE 13.6 (b) Plan E PeriodDemandProduction Subcont (Units)Ending Inv.Extra Cost ,4001, $8,000 21, ,000 31,8001, ,000 41,8001, ,2001, ,000 62,2001, ,000 71,8001, ,000 81,4001, ,000 Total Extra Cost: $129,000

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13 Unused CapacityTotal Supply JanFebMarAprMayJun January Regular Time Over Time Sub. Contract. February Regular Time Over Time Sub. Contract. March Regular Time Over Time Sub. Contract. April Regular Time Over Time Sub. Contract. May Regular Time Over Time Sub. Contract. June Regular Time Over Time Sub. Contract. Total Demand

14 EXERCISE Total Cost = 4 (800*12) + (200*16 ) + (100*17) + 5(300*16) + 2(1100*11) + (500*18.5) = 38, , , , , ,250 Total Cost = $100,750

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16 Unused CapacityTotal Supply Regular Time Over Time Sub. Contract. 2 Regular Time Over Time Sub. Contract. 3 Regular Time Over Time Sub. Contract. 4 Regular Time Over Time Sub. Contract. 5 Regular Time Over Time Sub. Contract. Total Demand

17 EXERCISE Total Cost = 4 (150*100) + (130*100 ) + 2(10*128) + (10*134)+ (30*131) + (20*103) + (10*125) +(50*135) = 60, , , , , , , ,750 Total Cost = $90,890

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19 EXERCISE EstimatedReg. time BillablebillableReg. Time“Overtime”OvertimeForrester MonthhoursCPAshourscosthourscosthourscost Jan $20,000 0 $0 0 0 Feb $20,000 0 $0 0 Mar 1, $20, $20, $5,000 Apr 1, $20, $20,000240$30,000 May $20, $625 0 $0 June $20,000 0 $0 0 $120,000650$40,625280$35,000 Total cost = $120,000 + $40,625 + $35,000 = $195,625

20 EXERCISE 13.22

21 Old Model Sales= Avg. passengers * Net price/seat = 80 * ( ) = $9,200 New Approach Sales = 65*(80-25)+35*(190-25) = 3, ,775 = $9,350 The new model is slightly better in sales.

22 HW


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