生产计划与控制作业Problem4Word文档格式.docx

生产计划与控制作业Problem4Word文档格式.docx

《生产计划与控制作业Problem4Word文档格式.docx》由会员分享，可在线阅读，更多相关《生产计划与控制作业Problem4Word文档格式.docx（15页珍藏版）》请在冰豆网上搜索。

a.Assumingthatshortagesarenotallowed,determinetheminimumconstantworkforcethathewillneedoverthenextfiveyears.

b.Evaluatethecostoftheplanfoundinpart（a）.

P4-2

ForthedatagiveninP4-1,graphthecumulativenetdemand.

a.Graphicallydetermineaproductionplanthatchangestheproductionrateexactlyonceduringthefiveyears,andevaluatethecostofthatplan.

b.Graphicallydetermineaproductionplanthatchangestheproductionrateexactlytwiceduringthefiveyears,andevaluatethecostofthatplan.

P4-3

AnimplicitassumptionmadeinP4-1wasthatdriedapricotsunsoldatthe'

L.endofayearcouldbesoldinsubsequentyears.Supposethatapricotsunsoldattheendofanyyearmustbediscarded.Assumeadisposalcostof$0.20perpackage.ResolveProblem9undertheseconditions.

P4-4

ThepersonaldepartmentoftheA&

MCorporationwantstoknowhowmanyworkerswillbeneededeachmonthforthenextsi5-monthproductionperiod.Thefollowingisamonthlydemandforecastforthesix-monthperiod.

MONTH

June

1,250

August

1,100

September

950

October

900

November

1,000

December

1,150

TheinventoryonhandattheendofJunewas500units.Thecompanywantstomaintainaminimuminventoryof300unitseachmonthandwouldliketohave400unitsonhandattheendofDecember.Eachunitrequires5employee-hourstoproduce,thereare20workingdayseachmonth,andeachemployeeworksan8-hourday.TheworkforceattheendofJunewas35workers.

a.Determineaminimuminventoryproductionplan（i.e.,onethatallowsarbitraryhiringandfiring）.

b.Determinetheproductionplanthatmeetsdemandbutdoesnothireorfireworkersduringthesix-monthperiod.

P4-5

Alocalsemiconductorfirm,Superchip,isplanningitsworkforceandproductionlevelsoverthenextyear.Thefirmmakesavarietyofmicroprocessorsandusessalesdollarsasitsaggregateproductionmeasure.Basedonordersreceivedandsalesforecastsprovidedbythemarketingdepartment,theestimateofdollarsalesforthenextyearbymonthisasfollows:

Month

Productiondays

PredictedDemand

（in$10,000）

January

22

340

February

16

380

March

21

220

April

19

100

May

23

490

20

625

July

24

375

12

310

175

145

165

Inventoryholdingcostsarebasedona25percentannualinterestcharge.Itisanticipatedthattherewillbe675workersonthepayrollattheendofthecurrentyearandinventorieswillamountto$120,000.Thefirmwouldliketohaveatleast$100,000ofinventoryattheendofDecembernextyear.Itisestimatedthateachworkeraccountsforanaverageof$60,000ofproductionperyear（assumethatoneyearconsistsof250workingdays）.Thecostofhiringanewworkeris$200,andthecostoflayingoffaworkeris$400.

a.Determinetheminimumconstantworkforcethatwillmeetthepredicted

b.Evaluatethecostoftheplandeterminedinpart（a）.

P4-6

ForthedatainP4-5,determinethecostoftheplanthatchangestheworkforcesizeeachperiodtomostcloselymatchthedemand.

P4-7

GraphthecumulativenetdemandfortheSuperchipdataofP4-5.Graphicallydetermineaproductionplanthatchangesproductionlevelsnomorethanthreetimes,anddeterminethetotalcostofthatplan.

P4-8.

ExcelsiorSprings,Ltd.,schedulesproductionofoneendproduct,Hi-Sulphur,inbatchesof80unitswhenevertheprojectedendinginventorybalanceinaquarterfallsbelow10units.Ittakesonequartertomakeabatchof80units.Excelsiorcurrentlyhas30unitsonhand.Thesalesforecastforthenextfourquartersis：

Forecast

Quarter

70

a.Prepareatime-phasedMPSrecordshowingthesalesforecastandMPSforHi-Sulphur.

b.Whataretheinventorybalancesattheendofeachquarter?

c.Duringthefirstquarter,nounitsweresold.Therevisedforecastfortherestoftheyearis：

30

50

HowdoestheMPSchange?

P4-9.

NeptuneManufacturingCompany’sproductionmanagerwantsamasterproductionschedulecoveringnextyear’sbusiness.Thecompanyproducesacompletelineofsmallfishingboatsforbothsaltwaterandfreshwateruseandmanufacturesmostofthecomponentpartsusedinassemblingtheproducts.ThefirmusesMRPtocoordinateproductionschedulesofthecomponentpartmanufacturingandassemblyoperations.Theproductionmanagerhasjustreceivedthefollowingsalesforecastfornextyearfromthemarketingdivision：

Productslines

Salesforecast（standardboatsforeachseries）

1stquarter

2ndquarter

3rdquarter

4thquarter

FunRayseries

8,000

9,000

6,000

SunRayseries

4,000

5,000

2,000

StingRayseries

10,000

7,000

Total

21,000

24,000

14,000

15,000

Thesalesforecastisstatedintermsof”standardboats,”reflectingtotalsalesvolumeforeachofthefirm’sthreemajorproductlines．Anotheritemofinformationsuppliedbythemarketingdepartmentisthetargetendinginventorypositionforeachproductline．Themarketingdepartmentwouldliketheproductionmanagertoplanonhavingthefollowingnumberofstandardboatsonhandattheendofeachquarterofnextyear:

Productline

Quarterlytarget

endinginventory

（instandardboats）

3,000boats

1,000boats

Theinventorypositionforeachproductis:

Current

Inventorylevel

Themasterproductionscheduleistospecifythenumberofboats（instandardunits）tobeproducedforeachproductlineineachquarterofnextyearonthefirm’ssingleassemblyline.Theassemblylinecanproduceupto15,000standardboatsperquarter（250boatsperdayduringthe60daysinaquarter）.

Twoadditionalfactorsaretakenintoaccountbytheproductionmanagerinpreparingthemasterproductionschedule：

theassemblylinechangeovercostandtheinventorycarryingcostforthefinishedgoodsinventory.Eachassemblylinechangeovercosts$5,000,reflectingmaterialhandlingcostsofchangingthestockingofcomponentpartsontheline,adjustingthelayout,andsoon.Aftersomediscussionwiththecompanycomptroller,theproductionmanagerconcludedthatthefirm’sinventorycarryingcostis10percentofstandardboatcostperyear.Theitemvalueforeachoftheproductlinestandardunitsis:

Standardboatscost

$100

150

Themasterproductionschedulerhascalculatedtheproductionlotsizesas5,000,3,000,and4,000units,respectively.

a.Developamasterproductionschedulefornextyear,byquarter,foreachofNeptune’sfishingboatlines.Identifyanyproblems.

b.VerifythelotsizecalculationsusingtheEOQformula.

P4-10.

TheMPSplanneratMurphyMotorsusesMPStime-phasedrecordsforplanningenditemproduction．TheplanneriscurrentlyworkingonaschedulefortheP24,oneofMurphy’stop-sellingmotors．Theplannerusesaproductionlotsizeof70andasafetystockof5fortheP24motor.

Week

6

7

8

40

45

Orders

13

Available

Availabletopromise

MPS

Onhand=20

a.CompletetheMPStime-phasedrecordforproductP24.

b.CanMurphyacceptthefollowingorders？

UpdatetheMPStime-phasedrecordforacceptedorders.

Order

Amount

Desiredweek

25

P4-11.

NinoSpirellihasconstructedthefollowing（partial）time-phasedMPSrecord:

14

Onhand=5

a.Completetherecord.

b.Arethereanyproblems？

c.What'

stheearliestNinocanpromiseanorderfor44units?

d.Assumethatanorderfor15isbookedforweek4.Assumetheorderfor44

unitsinpartcisnotbooked;

recomputetherecord.

P4-12.

TheNonameComputerCompanybuildsacomputerdesignatedmodelICU2.ItimportsthemotherboardofthecomputerfromTaiwan,butthecompanyinsertsthesocketsforthechipsandboardsinitsplantinLubbock,Texas.Eachcomputerrequiresatotalof9064KDRAM（dynamicrandomaccessmemory）chips.Nonamesellsthecomputerswiththreeadd-inboardsandtwodiskdrives.ThecompanypurchasesboththeDRAMchipsandthediskdrivesfromanoutsidesupplier.TheproductstructurediagramfortheICU2computerisgiveninFigure4-1.Supposethattheforecastedde