Storage Policies and Maintenance Support Strategies in Warehousing Systems PDF
Preview Storage Policies and Maintenance Support Strategies in Warehousing Systems
Springer Theses Recognizing Outstanding Ph.D. Research Xiaolong Guo Storage Policies and Maintenance Support Strategies in Warehousing Systems Springer Theses Recognizing Outstanding Ph.D. Research Aims and Scope The series “Springer Theses” brings together a selection of the very best Ph.D. theses from around the world and across the physical sciences. Nominated and endorsed by two recognized specialists, each published volume has been selected foritsscientificexcellenceandthehighimpactofitscontentsforthepertinentfield of research. For greater accessibility to non-specialists, the published versions includeanextendedintroduction,aswellasaforewordbythestudent’ssupervisor explainingthespecialrelevanceoftheworkforthefield.Asawhole,theserieswill provide a valuable resource both for newcomers to the research fields described, and for other scientists seeking detailed background information on special questions. Finally, it provides an accredited documentation of the valuable contributions made by today’s younger generation of scientists. Theses are accepted into the series by invited nomination only and must fulfill all of the following criteria (cid:129) They must be written in good English. (cid:129) ThetopicshouldfallwithintheconfinesofChemistry,Physics,EarthSciences, Engineeringandrelatedinterdisciplinary fields such asMaterials,Nanoscience, Chemical Engineering, Complex Systems and Biophysics. (cid:129) The work reported in the thesis must represent a significant scientific advance. (cid:129) Ifthethesisincludespreviouslypublishedmaterial,permissiontoreproducethis must be gained from the respective copyright holder. (cid:129) They must have been examined and passed during the 12 months prior to nomination. (cid:129) Each thesis should include a foreword by the supervisor outlining the signifi- cance of its content. 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More information about this series at http://www.springer.com/series/8790 Xiaolong Guo Storage Policies and Maintenance Support Strategies in Warehousing Systems Doctoral Thesis accepted by the University of Science and Technology of China, ’ Hefei, People s Republic of China 123 Author Supervisor Dr. XiaolongGuo Prof. Yugang Yu University of Science andTechnology Schoolof Management ofChina University of Science andTechnology Hefei ofChina People’sRepublic ofChina Hefei People’sRepublic ofChina ISSN 2190-5053 ISSN 2190-5061 (electronic) SpringerTheses ISBN978-981-10-1447-5 ISBN978-981-10-1448-2 (eBook) DOI 10.1007/978-981-10-1448-2 LibraryofCongressControlNumber:2016939576 ©SpringerScience+BusinessMediaSingapore2016 Thisworkissubjecttocopyright.AllrightsarereservedbythePublisher,whetherthewholeorpart of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission orinformationstorageandretrieval,electronicadaptation,computersoftware,orbysimilarordissimilar methodologynowknownorhereafterdeveloped. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publicationdoesnotimply,evenintheabsenceofaspecificstatement,thatsuchnamesareexemptfrom therelevantprotectivelawsandregulationsandthereforefreeforgeneraluse. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authorsortheeditorsgiveawarranty,expressorimplied,withrespecttothematerialcontainedhereinor foranyerrorsoromissionsthatmayhavebeenmade. Printedonacid-freepaper ThisSpringerimprintispublishedbySpringerNature TheregisteredcompanyisSpringerScience+BusinessMediaSingaporePteLtd. Parts of this thesis have been published in the following journal articles: 1. Yugang Yu, René de Koster, Xiaolong Guo*. Class-based storage witha finite number of items: Using more classes is not always better. Production and OperationsManagement24(8):1235–1247,2015.[Reproducedwithpermission from John Wiley and Sons] 2. Xiaolong Guo,YugangYu*,RenédeKoster.Impact ofrequiredstoragespace onstoragepolicyperformanceinaunit-loadwarehouse.InternationalJournalof Production Research 54(8): 2405–2418, 2016. [Reproduced with permission from Taylor & Francis] *Corresponding author To my father, my wife, and the memory of my mother ’ Supervisor s Foreword The statement that “more classes will provide higher performance of warehousing systemsunderclass-basedstoragepolicy”hasbeenageneralconclusionexistedin the field of industrial and production engineering during the past several decades. Full turnover-based storage is claimed to provide the best system performance by creatingdifferentclassesforeachproduct.However,thiswell-knownconclusionis rarely adopted in practice, and three- to five-class-based storage is usually imple- mented.Thisinconsistencyhasbeenanunsolvedproblemduringthepast40years, and no literature has theoretically demonstrated that too many classes degrade the system performance. This motivated us to investigate assumptions in the literature leading to this inconsistency. The cause of the inconsistency appears to be the assumptionthat“thespaceneededperstorageclassequalsthesumoftheaverage inventory levels of the items in the class”. However, when items arrive in a batch quantity,sufficientspaceshouldbeavailabletostorealltheitemsofthesameclass. Therefore, items sharing a storage class need more space than just their average stocklevel.Ifthenumberofstorageclassesincreases,thenumberofitemsperclass decreases and more space per item is needed on average, as the opportunity for space sharing decreases. This increases the average travel time for storing and retrieving items, and finally offsets the travel-time reduction, resulting from dividing items over a large number of classes according to their turnover. This trade-offwasoverlookedintheexistingliteraturewheremostscholarsassumedthat the required storage space per item equals its average inventory level. In addition to warehousing assignment policies, the maintenance support strat- egyforassembledequipmentisanotherhottopicinthefieldofmanufacturingand operations management. The performance-based contract (PBC) emerges as a new service model replacing the resource-based contract (RBC) in the after-market service supply chains. Existing studies indicate that system availability will be increased by 25–40 % under PBC than that under RBC. Most of previous studies aim to find the optimal contract terms leading to the minimal maintenance cost under a given availability target. However, enterprises in practice aim to obtain maximalprofitinsteadofminimalmaintenancecost.Tothebestofourknowledge, ix x Supervisor’sForeword no study has yet discussed after-sales maintenance contract considering the profit-maximizing target from the viewpoint of the profitability of the system. Takingintoaccountthebackgroundofthesetworesearchtopics,Dr.Guostarted hisPh.D.,expectingtofindsomeanswersinhisthesis.First,relaxingofthepopular assumption of conventional research. Dr. Guo studied the class-based storage policyconsideringafinitenumberofitemsinstore.Theresultsindicatethatthree- tofive-class-basedstoragepolicywillbeoptimalforwarehousingsystemsoperated inasingle-commandmode.Second,PBCwasstudiedwiththeconsiderationofthe profitability of the maintained equipment. Results show that all customers will provide the same cost reimbursement for service supplier when the shared spare inventory is established. It also indicates that the maintenance service supplier can benefitfrompoolingthespareinventoryonlywhentheunitcostofitssparepartis sufficiently low. His work provides us with important insights and suggestions for warehousing operations management and maintenance support management from both theoretical and practical perspectives. Hefei Prof. Yugang Yu March 2016 Acknowledgments First and foremost, I would like to express my deepest gratitude to my supervisor, Prof. Yugang Yu, for his patient guidance, continuous encouragement, and finan- cial support during my Ph.D. His profound scientific attainments and rigorous attitude in academic research encouraged me to challenge the significant scientific problems. My ability to find and solve scientific problems extremely improved during the process. Professor Yu gave me the attentive care and guidance on the way of my growth in academic research, from proposing the research ideas to formulatingthemodels,extractingtheinsights,andsummarizingthecontributions. Itwouldhavenotbeenpossibleformetocompletethethesiswithouthisboundless support. During my Ph.D., Prof. Yu encouraged me to present research results on academicconferencesandtocommunicatewithrenownedscholarsinrelatedfields. Particularly, the visit to Rotterdam School of Management (RSM), Erasmus University from March to September 2013 is the most important academic expe- rienceforme,anditwillbeapreciousfortuneinmyacademiccareer.Myattitude in research and skill of academic English are significantly improved during this visit.IwouldalsoliketotakethisopportunitytoextendmygratitudetoProf.Liang Liang who provided me the first opportunity to start my academic career, and Dr. Liuyi Ling who guided me to accomplish my first research article. My gratitude also goes to Prof. René de Koster who hosted and supervised me during my visit at RSM. His open-minded, enthusiastic, and rigorous attitude in academicresearchstrengthenedmydeterminationtobeaprofessionalscholar.The helpofDr.NimaZaerpour,Dr.AmirHosseinGharehgozli,Dr.DongLi,andother colleagues at RSM are very grateful. Iamthankfulforthesufficientencouragementandselflesshelpfromprofessors andresearchersfromdifferentcountriesanduniversities.Therearemanyofthemto name for appreciation. They are Prof. Zhimin Huang from Adelphi University, Prof. Jinfeng Yue from Middle Tennessee State University, and Dr. Sean Zhou from the Chinese University of Hong Kong. Colleagues of the School of Management,UniversityofScienceandTechnologyofChinaincludingProf.Feng Yang, Prof. Gongbing Bi, Dr. Shaofu Du, Dr. Tengfei Nie, and members of xi
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