SAP PP模块 PA教程 EXP0006.docx

SAP PP模块 PA教程 EXP0006.docx

《SAP PP模块 PA教程 EXP0006.docx》由会员分享，可在线阅读，更多相关《SAP PP模块 PA教程 EXP0006.docx（19页珍藏版）》请在冰豆网上搜索。

SAPPP模块PA教程EXP0006

1

1.2

1.3

1.4

⏹Masterproductionscheduling（MPS）enablesyoutoplanmaterialsthatgreatlyinfluenceacompany'sprofitsandcriticalresourcesandthereforeneedtobeplannedmorecarefully.Itistypicalforthesesmaterialsthatthemasterproductionscheduleisinitiallydefinedonthelevelofthiscriticalorimportantmaterialbeforethedependentassembliesandpurchasedpartsareplannedandprocured.Thismeansthatchangesmadetothesecriticalpartsarenotcopiedtothedependentparts,thusavoidinganydisruptionarisingduringproductionandprocurementofpurchasedparts.

⏹Youplanthemasterscheduleitems（MPSitems）andthenon-masterscheduleitemsinseparateplanningruns.YouareabletospecifyfinishedproductsorassembliesformasterscheduleitemsprovidedthatyouhaveenteredacorrespondingMRPtypeperplantorperMRPareainthe"MRP1"viewofthematerialmaster.YoumustdefinetheMRPprocedure"M"（masterscheduleitemprocedure）inthisMRPtypeinCustomizingforMRPtypes（Customizingactivity"CheckMRPtypes"）.

⏹Themasterproductionschedulingrunonlyplansthemasterscheduleitems.MasterproductionschedulingisexecutedwiththesamelogicasmaterialrequirementsplanningbutwithoutplanningmaterialsthatarenotlabelledasMPSitems.Dependentrequirementsarecreatedforthenextlow-levelcode,butplanningisnotexecutedfortheseitemsunlesstheyareMPSitems.

⏹Theresultsofmasterproductionschedulingarenotpassedontodependentpartsuntilthemasterplanforthecriticalpartshasbeenprocessedandfinely-tuned.MasterscheduleitemsarenotplannedalongwiththeMRPruntoensurethatyoucanplanthesematerialsindependently.

1.5

⏹Masterproductionschedulingtakesplaceontwolevels:

1.Masterproductionscheduling（MPS）plansthemasterscheduleitemsonthebasisoftherequirementsthatexistfortheseparts（forexample,plannedindependentrequirements）.TheMPSrungeneratesplannedordersforthemasterscheduleitemsandthecorrespondingdependentrequirementsontheBOMlevelbelow.CapacitylevelingispossibleontheMPSlevel.

2.MRPplanstheotherassembliesandcomponentsintheBOMstructure.

⏹InthecaseofatotalMPSrun,youcancombinebothstepsbysettingtheindicator"ProcessMRPmaterials"intheinitialscreen.

1.6

⏹InteractiveMPSenablesyoutochecktheresultsoftheautomaticplanningrunformasterscheduleitems.Youareabletomakeunlimitedchangestothemasterproductionscheduleandcapacityrequirements,wherenecessary.

⏹IninteractiveMPS,thesysteminitiallygeneratesthecurrentplanningsituationaccordingtothedatainthecurrentstock/requirementslist.Youthenmanuallytriggertheplanningandsimulationfunctions.

⏹Youareabletoviewtheresultsofthechangesinasimulationphase.ThesystemdoesnotcopytheplanningdatatothedatabaseuntilyousavetheinteractiveMPS.

⏹InteractiveMPSisespeciallyusefulwhenadjustingthedatesoftheplannedordersrequiredintheplanningtimefence.YouareabletoperforminteractiveMPSforpartsbothproducedin-houseandprocuredexternally.

⏹MaterialswithMRPtypes,whichareassignedMRPprocedure"D"inCustomizingforMRPtypes,arerequirementsplannedusingMRP（Customizingactivity"CheckMRPtypes"）.

1.7

⏹Withthehelpofthefirmingperiod,youareabletoprotectthemasterproductionscheduleformasterscheduleitemsfrombeingautomaticallychanged.Withinthefirmingperiod,whichisdefinedindividuallyforeachmaterial,orderproposalsarenolongerautomaticallychangedduringtheMRPrun.

⏹Youshoulddefinethefirmingperiodwithreferencetothetotalleadtimeofthematerial.

⏹Intheaboveexample,theorderfinishdateoftheplannedorder,E1,liesonedaybeforetheendofthefirmingperiod.Thesystemthereforetreatsitasfirmedanddoesnotautomaticallyrescheduleit.Themasterproductionscheduleforthecomponentsisthereforestabilized.

⏹Thesystemwilldrawyourattentiontoanypossiblechangestothemasterproductionscheduleintheformofan"exceptionmessage"intheMRPlist.ItisthentheresponsibilityoftheMRPcontrollertoprocessthesechanges.

1.8

⏹Therearevariousfirmingproceduresatyourdisposal:

⏹ThefirmingtypeinstructstheMRPrunhowtheorderproposals（especially,plannedordersandpurchaserequisitions）aretobefirmedandinwhichordertheyaretobescheduledwithinthefirmingperiod.

⏹YouspecifythefirmingproceduretobeusedpermaterialusingthetheMRPtype.ThefirmingtypeisdefinedinCustomizingforMRPtype.

⏹Youcanusefirmingformaterialsplannedwithbothmasterproductionschedulingandmaterialrequirementsplanning.Tothisend,thecorrespondingMRPtypesareavailableinthestandardsystem.

1.9

1.10

⏹Youcandefinethefirmingperiodusingtheplanningtimefence.ThesystemherebyusestheMRPdateasabasefordynamicallycalculatingthefinishdateofthefirmingperiod.

⏹YoucandefinetheplanningtimefenceeitherpermaterialinthematerialmasterrecordorusingtheMRPgroupassignedtothematerialmaster.

⏹Youareabletoreorganizefirmedplannedorderswiththehelpoftherollforwardperiod.The"Rollforwardindicator"inCustomizingfortheMRPtypecontrolswhethertherollforwardmechanismisappliedforamaterialornot.YoucanmaintaintherollforwardperiodforeachMRPgroup.

⏹Allfirmedplannedorderswhoseorderfinishdateliesaftertheendoftherollforwardperiodareeitheradjustedtothecurrentrequirementordeleted.

1.11

⏹Youcanalsodefinethefirmingperiodbymanuallyenteringadatelyinginthefuture-thatis,the"manualfirmingdate".

⏹Thesystemcanonlyautomaticallyfirmorderproposalslyingbeforethemanualfirmingdateifthematerialhasnotbeenassignedafirmingtypeorhasfirmingtype"1"or"2".

⏹MaterialsthathavebeendefinedwithanMRPtypewithoutafirmingtypeareprocessedasmaterialswithfirmingtype"1"andwithreferencetothemanualfirmingdate.

⏹Ifyouhavesetamanualfirmingdateandaplanningtimefenceisactive,theninthecaseofthisdatebeinglaterthanthemanualfirmingdate,thefirmingperiodisdeterminedbytheendoftheplanningtimefence.Ifthemanualfirmingdateisthelaterofthetwodates,thenthisdefinesthefirmingperiod.

⏹Yousetandresetthemanualfirmingdateinthecurrentstock/requirementslist,intheplanningresultsorinsingle-term,interactiveplanning.

⏹Youcanapplythisfunctioninmaterialrequirementsplanning,masterproductionschedulingorlong-termplanning.

1.12

⏹Ifaplannedorderischangedmanually,thesystemautomaticallysetsthe"firmed"indicatorforthisplannedorder.Thismeansthattheheaderdataoftheplannedorderwillnotbechangedinthenextplanningrun.

⏹Ifacomponentinaplannedorderischangedmanually,thesystemalsosetsthe"firmed"indicatorforthecomponents.Thismeansthatthecomponentsoftheplannedorderwillnotbechangedinthenextplanningrun.

⏹Thefirmingindicatorsfortheplannedorderorthecomponentsoftheplannedordercanbechangedmanually.

⏹Byresettingtheconversionindicatorintheplannedorder,youcanpreventtheplannedorderbeingconvertedintoaproductionorderorpurchaserequisition.

1.13

⏹Inmasterproductionschedulingandmaterialrequirementsplanning,twolistsareusedtodisplayinformation.Inthese,theplanningperiodsarerepresentedonaverticaltimeaxis:

-Capacityleveling:

forcarryingoutlevelingwithchanges.

-Capacitysituation:

onlyfordisplayingthedata.

⏹Thecapacitysituationorthecapacitylevelingcanbecalledupforallplannedordersforamaterialorjustforasingleplannedorder.

⏹Thefollowingdataareperiodicallyreleasedforaworkcenter:

-Theavailablecapacityoftheworkcenterwithinaperiod,

-Thetotalcapacityloadoftheworkcenterbyallplannedandproductionorderswithinaperiod.

⏹Bychangingtheorderquantityandtheorderfinishdate,youhavetheoptionofreducingtheunderloadsandoverloadsoftherespectiveworkcenter.

1.14

1.15

1.16

MasterProductionSchedulingExercises

Unit:

MPS

Topic:

Firming

Attheendoftheseexercises,youwillbeableto:

∙Discusstheeffectsoffirming,

∙usefirmingtoeasetheplanningprocess.

TheproductionofthepumpT-F1##isplannedinplant1000forthenearfuture:

plannedindependentrequirementsareenteredinthesystemandplannedordersarecreatedaccordingly.Followingtheplanning,productiondemandsitshouldnothavetodealwithanyotherplannedorderswithinthenext20workingdays.Intheshortrun,thisperiodshouldbeextendedtotheendofthemonthafternext.

MakesurethatthefollowingentrieshavebeenmadeinthematerialmasterofthematerialT-F1##inplant1000:

strategygroup40,andatimeperiodof30daysforthebackwardandforwardconsumptionperiods.Also,intheMRP1view,changetheMRPtypetoMO–MPSfixingtype0.

1-1CreateplannedindependentrequirementsformaterialT-F1##inplant1000:

startingfromtheDemandManagementmenu,enterthefollowingactiveVSFplannedrequirementsformaterialT-F1##inplant1000inplannedindependentrequirementsversion00.UseplanningperiodW（week）.

Currentweek+1

Currentweek+2

Currentweek+3

Currentweek+4

Currentweek+5

20

10

10

10

10

ConfirmanywarningswithEnterandsavetherequirements.

1-2Executesingle-item,single-levelmasterproductionschedulingformaterialT-F1##inplant1000andcallupthestock/requirementslistforthismaterial.

1-2-1Isaplanningtimefenceactiveforthismaterial（thatmeans,isthesystemdisplayin