全球运营管理课件new gom3-supplement and exercise

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1、GOM3ExerciseReturntoKingforUsingMoreMachinesNumberofMachinesTypeofnextmachineMachineTimes(min)CycleTime(min)TotalHourlyOutputEfficiency(%)ABCD4--4310210647.55C435251276.067891011121314ReturntoKingforUsingMoreMachinesNumberofMachinesTypeofnextmachineMach

2、ineTimes(min)CycleTime(min)TotalHourlyOutputEfficiency(%)ABCD4--4310210647.55C435251276.06C433.33241579.27A233.3323.331881.48C232.5232079.29B21.52.522.52484.410C21.52223095.011D21.52123086.012A1.331.52123079.213C1.331.51.6711.673687.514C1.331.51.4311.54

3、090.5Question:ThemodelJWagonistobeassembledonaconveyorbelt.Fivehundredwagonsarerequiredperday.Productiontimeperdayis420minutes,andtheassemblystepsandtimesforthewagonaregiveninthefollowingExhibit.Assignment:findthebalancethatminimizesthenumberofworkstati

4、ons,subjecttocycletimeandprecedenceconstraints.TASKTASKTIMEINSECONDSDESCRIPTIONTASKSTHATMUSTPRECEDEA45Positionrearaxlesupportandhandfastenfourscrewstonuts.--B11InsertrearaxleAC9TightenrearaxlesupportscrewstonutsBD50Positionfrontaxleassemblyandhandfasten

5、withfourscrewstonuts--E15TightenfrontaxleassemblyscrewsDF12Positionrearwheel#1andfastenhubcap.CG12Positionrearwheel#2andfastenhubcap.CH12Positionfrontwheel#1andfastenhubcap.EI12Positionfrontwheel#2andfastenhubcap.EJ8Positionwagonhandleshaftonfrontaxleas

6、semblyandhandfastenboltandnutF,G,H,IK9TightenboltandnutJ1951.DrawaPrecedenceDiagram.ABCFJDEHIGK45sec50sec11sec15sec9sec12sec12sec12sec12sec8sec9sec2.Determineworkstationcycletime.HerewehavetoconverttosecondsbecauseOurtasktimeareinseconds3.Determinetheth

7、eoreticalminimumnumberofworkstationsrequired(theActualnumbermaybegreater.ABCFJDEHIGK45sec50sec11sec15sec9sec12sec12sec12sec12sec8sec9secWS1WS2WS3:B,E,C,FWS4:G,H,I,JWS5TASKNUMBEROFFOLLOINGTASKSA6BorD5CorE4F,G,HorI2J1K04.Selectassignmentrulesa.assigntasks

8、inorderofthelargestnumberoffollowingtasksb.assigntasksinorderoflongesttasktime5.MaketaskassignmentstoformWorkstation1,Workstation2…..6.Calculateefficiency:assume5first?7.Evaluatethesolution.Anefficiencyof77percentindicatesanimbal