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Unit9.AutomatedStorageSystems9.1UnitIntroduction9.2UnitLearningObjectives9.3StorageSystems9.4ConventionalStorage9.5AutomatedStorageSystems9.6AutomatedStorageandRetrievalSystems9.7CarouselStorageSystems9.8UnitReview9.9Self-AssessmentQuestions9.10Self-AssessmentAnswers9.1UnitIntroductionStorageisanessentialfunctioninanautomationsystem.Thematerialstoragesystemallowsmaterialstobestockedforaspecifiedperiodoftime,beforetheyarere-introduced,orareintroducedforthefirsttime,intotheautomationsystem.Thesortsofstoredmaterialarerelatedtotheproduct(e.g.rawmaterials,purchasedparts,work-in-process,finishedproducts,andscrapandrework),theprocess(e.g.processrefuse,suchasprocesswasteproducts;andtooling),andtheoverallsupportfunctionsinthefactory(e.g.maintenancespareparts,officesupplies,andplantrecords).Eachofthesematerialtypesistypicallystoredunderdifferentconditionsandcontrols.KEYPOINTAmaterialstoragesystemallowsmaterialstobestockedforaspecifiedperiodoftime,beforetheyarere-introduced,orareintroducedforthefirsttime,intotheautomationsystem.ENDKEYPOINTInthisunitstorageequipmentisdescribed,alongsideappropriatemethodsinbothconventionalandautomatedstoragesystems.Storagesystemperformanceandlocationstrategiesexaminetheoperatingcharacteristicsassociatedwithstoragesystems,andwherebesttoplaceandorganisethemintheplantlayout.Conventionalstoragemethodsandequipmentturnstoaninvestigationofhowstorageisregularlyaccomplished,andthepiecesofequipmentthatisusedtoachievestorageaims.Automatedstoragesystems,whichreduceoreliminatehumaninterventioninthesystem,aresubsequentlydescribed.Thisisfollowedbyanengineeringanalysisofstoragesystems,intheirvariousguises.Acasestudycompletesthematerialoftheunit,followedbythereviewoftheunitandtheself-assessmentquestionsandanswers.9.2UnitLearningObjectivesAftercompletingthisunityouwillbeableto:BULLETLISTExplainthemeaningofamaterialstoragesystem,andissuesthataffectitsoperatingcharacteristicsDetermineperformancemeasuresusedtoassessstoragesystemperformanceListmethodsandequipmentusedforstoragepurposesListthetypesofautomatedstoragecategoriesthatcanbeexaminedDefineautomatedstorage/retrievalsystems(AS/RS)andtheirassociatedequipmentDefinecarouselstoragesystemsandtheirconstructionListthedeterminantsofaislecapacityandsystemthroughputforAS/RSListthedeterminantsofsizeandcapacityforcarouselsystemsENDLIST9.3StorageSystemsStoragesystemsareusedtostorematerialsrelatedtotheproduct(e.g.rawmaterials,purchasedparts,work-in-process,finishedproducts,andscrapandrework),theprocess(e.g.processrefuse,suchasprocesswasteproducts;andtooling),andtheoverallsupportfunctionsinthefactory(e.g.maintenancespareparts,officesupplies,andplantrecords).Storagesystemscanbeclassifiedintoconventionalstoragesystemsandautomatedstoragesystems(Figure9.1).Figure9.1:ConventionalandAutomatedStorageSystemsWecanspecifytwosetsofoperatingcharacteristicsandissueswhenitcomestostoragesystems;theseare:BULLETLISTStoragesystemperformanceStoragelocationstrategiesENDLISTKEYPOINTStoragesystemoperatingcharacteristicscanbeexaminedontwosetsofissues:storagesystemperformance;andstoragelocationstrategies.ENDKEYPOINT9.3.1StorageSystemPerformanceArespectivestoragesystemmustjustifyitselfintermsofinvestmentandoperatingexpense,byprovidinganadequatelevelofperformance.PerformancemeasuresusedtoassessthisperformancearedetailedinTable9.1.Table9.1:Storagesystemperf...