PIR的Consumption和Reduction

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1、基本概念：PIR（PlannedIndependentRequirement）的Consumpiton（消耗）和Reduction（減小）是什麼。前者是MD04中的視覺效果，是動態變化的；後者則是真真正正減小了PIR，增加了提取數量。Theconsumptionreducesplannedindependentrequirementsdynamically,whereasthereductionphysicallyreducestheplanningquantityandincreasesthewithdrawalquantitya

2、ccordingly.SAPNote:772856 1.Question:Whatisthedifferencebetweenplannedindependentrequirementconsumptionandplannedindependentrequirementreduction?Answer:Theconsumptionreducesplannedindependentrequirementsdynamically,whereasthereductionphysicallyreducestheplanningquantit

3、yandincreasesthewithdrawalquantityaccordingly.Forexample:Youcreateaplannedindependentrequirementwith100pieces.Thisplannedindependentrequirementisconsumedagainstasalesorderwith10pieces.Theplanningquantityandwithdrawalquantityremainthesame(seeMD63)buttheplannedindependen

4、trequirementisdisplayedinthestock/requirementslist(MD04)withthequantity90.Theindependentrequirementsreductionoccurswhenyoupostthegoodsmovement,inthiscase,withthegoodsissueforthesalesorder.Theplanningquantityoftheplannedindependentrequirementisreducedto90piecesandthewit

5、hdrawalquantityisincreasedfrom0to10(seeMD63).Inthestock/requirementslist,theplannedindependentrequirementisstilldisplayedwith90piecesdespitethereducedplanningquantitybecausewhenyoupostthegoodsissue,thecustomerrequirementagainstwhichtheplannedindependentrequirementshadb

6、eenconsumedalsodisappears.2.Question:Whichconsumptionparameters(Consumptionmode/consumptionperiod)aretakenintoaccount?Answer:Theparametersmaintainedinthematerialmaster(materialrequirementsplanningview3)havethehighestpriority.Ifyoudonotspecifyaconsumptionmode,thesystemu

7、sestheconsumptionparametersfromtheMRPgroupthatisassignedtothematerial.Ifaconsumptionmodeisnotspecifiedthere,theconsumptionmodeissetto'1'bydefault(backwardconsumptiononly)witha(backward)consumptionperiodof999days.Thismeansthattheconsumptioncannotbedeactivatedbecausethec

8、onsumptionparametershavenotbeenmaintained.Theconsumptionperiodsarecalculatedinworkdays.3.Question:WherecanIcheckwheth