2001年度日本オペレーションズ・リサーチ学会 秋季研究発表会
1−E−6
可能性理論により新聞売り子問題について 01991735香川大学 郭 柿俊 GUO Peijun 1.PossibilisticmdelfbrNewsboyproblem Consideraretailerwhosellsashortliftcycle,OrSlngle−periodnewprduct・Theretailerordersqunitsbeforethe seasonattheunitwholesalepriceW.Thendemanddisobserved,andtheretailersellunits(limitedbythesupplyqand thedemandd)atunitrevenueR(R>岬).AnyexcessunitscanbesalvagedattheunitsalvagevalueS・Forexample, excessunitscanbesoldatareducedpriceS<WRiortothesellingseason,demandisuncertain・Howevertheretailer canknowplausibleinfbrmationofdemandrepresentedbyapossibilitydistribution・Thepro伝tfunctionoftheretaileris asfb1lows: r=尺min(d,ヴ)+∫(守一d)+一明, (1) whereqisadecisionvariableanddisgovernedbyapossibilitydistribution7r(d)givenbyexpertStOreneCtplausible infbrmationonthedemandand a’is α+=‡ Supposethatthepossibilitydisb・ibutionfbrdemandischaracterizedbythefbllowlngbiangularfunction (2) ト; 叫 1 , d=d。 叫1−ま号, 0 , OJんgm∫∫e
(3) 方(d)= Dennitionl.Foragivensupplyq,theutilityfunction u(d,q)1SglVenaSfo1lows: (−C(ヴ)) +(1・輌)= 尺一∫ (d−d′)+(1+g)C(曾);d≦q d>曾 (尺−W)d〟 (4) 〟(d,曾)= +gC(曾); d] (尺−∫)d′−(W−∫)q (5) C(曾)= (尺−W)d〟 Theoreml・Optimalsupply qニbasedontheoptimisticcriteriondefinedin[1]is .β2 曾〝=盲r’ where 別=(2d〟−d。)(尺−W卜g(d〟−d。)(仲㌧−∫),β2=dヱ(尺−W卜g(d〟−d。)d′(尺−∫),0≦g< Theorem2・Optimalsupply q;basedonthepessimisticcriteriondennedin[1]is . β4 曾ク=嘉’ (6) 尺一W W−∫ (7) ー96一 © 日本オペレーションズ・リサーチ学会. 無断複写・複製・転載を禁ず.Where β3=(d〟十d。−d′)(尺−Ⅳ)+g(d′−d‘・)(Ⅳ−∫),β4=d〟d。(尺−Ⅳ卜d′(d。一d′)(尺−∫),0≦g< 尺一休/ W−∫ 2.Possibilisticmdelfbrsupplycontract:realopt10n Aheadofseason,theretailerbuysqcalloptlOnSatunitcostTEachcalloptlOnglVeStheretailertherighttobuya unitofthepr∝luctattheunitexercisepricePaf【ertheretai1erobservesthedemand・Ifthedemanddisnotlessthanq, thanretailercanbuyqunitsofpr∝luctattheexercisepriceP(P<明,elsebuydunitsofpr∝1uctatthepriceP,The pro頁toftheretai1er,r,isglVenbythefollowlngeXpreSSion‥ r=(尺−P)min(d,ヴ)一句 De貞nition2.ForaglVenSupPlyq,theutilityfunction u(d,q)lSglVenaSfbllows: (8) (−V(ヴ)) 十…)V(ヴ)= 尺−P (d−d′)+(1+g)V(q);d≦q d>ヴ (尺−P−r)d〟 (9) 〟(d,ヴ)= +gV(ヴ); d〟 (尺−P)d′−7セ (10) V(9)= (尺−グーr)d〟 Theorem3・Optimalsupply qニfbrrealoptionbasedontheoptlmisticcriterionis . β6 留仰=’ Where β5=(2d.−d。)(尺−クーr)−g(d〟−d。)r,β6=dヱ(尺一戸−r卜g(d〟−d。)d′(尺−P),0≦g≦ Theorem4・Optimalsupply q;tbrrealoptionbasedonthepeSSimisticcriterionis . β8 9ヮ=前’ where (11) 尺−P−r (12) 尺−P−r β7=(d〟+d。−d′)(尺−P−r)十£(d′−d。)r,郎=d〟d。(尺−クーr)+gd′(d′−d。)(尺−P)・0≦g≦ References [1]Dubois,D.,Nguyen,H.T.and針ade,H.,Possibilitytheory,prObabilityandfuzzysets:Misunderstanding,Bridges andgaps,FundamentalsofFuzzySets(Dubois,DandPrade,H・eds・),HandbookofFuzzySets,KluwerAvademic Publication,2CKX),343−438. [2]Rudi,N.andPykeF.D.,Tbachingsupplychainconceptswiththenewsboym∝lel,SupplyChainManagement: InnovationsfbrEducation,POMSSeriesinTechnologyandOperadonsManagementVolume2,2000・ [3]H.ThnakaandPGuo,PossibilisticDataAnalysisfbrOperationsResearch(Heideltxrg;NewYork;Physica一Ⅵrlag, Feb.,1999). −97一 © 日本オペレーションズ・リサーチ学会. 無断複写・複製・転載を禁ず.