运营管理例题

《运营管理例题》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、一-Determiningthecapacitylevel(确定能力水平)expandingthecapacityP287-2881>Costofwaitingisknown等待成本已知①：算一个总的成本MC(includingtheequipment,humanresource)②：再算受影响的顾客affectednumberofCustomers③：算一个收益MB(用受影响的顾客悯获得的时间*等待成木)④：比较MC和MB(MC

2、theywanttoincreaseanadditionalequipmenttoincreaseefficiency.Anadditionalequipmentrequiresaninvestmentof$100000,assumeusefullifetobe5years・Anoperatormustbehiredtoruntheequipmentandpaid$15perhour.Assumetheadditionalequipmentisoperatedfrom8:00amto10:00amandalsofrom5:00pmt

3、o7:00pminthewholeyear,anditworks5daysaweek.Assumeeverymonthhas3.5weeks.Becauseofit,theaveragewaitingtimepercustomerwilldropfrom45minto15minoragainof30min,andwillaffect20.5customersperhour.Ifweassumethatthevalueofwaitingforthecustomeris$4.5perhour.Soisitworthwhileexpand

4、ingthecapacitytoonemoreequipment?Why?答案：Calculatethetotalcostofthewholeyear:($15*4hours*5days*3.5weeks*12mouth)+($100000/5years)=$32600thetotalnumberofcustomersaffect:20.5customer*4hours*5days*3.5weeks*12=17220customersTheincreasedvalueforcustomer(orsavedvalueforcustom

5、er):17220customers*30min/60min*$4.5=$38745$38745>$32600soifsworthwhileexpandingoneequipment.2^Costofwaitingisnotknown等待成本未知P290•a=marginalcostofcapacityexpansion总成本•b=costofwaitingpertimeunitandpercustomer等彳i矣成木•Aw=themarginalreductionofaveragewaitingtimepercustomer赚取的

6、时间•N=totalnumberofcustomerswhoseaveragewaitingtimewillbereducedoverthetimehorizonconsidered所受影响的顾客Ifb>,thentheexpandingisworthwhile△w*NIfb<——-——，thentheexpandingisn'tworthwhile(上面那道题改成等待成本未知)二*Customeristurnedaway(打发顾客)tocalculatetheoptimalcapacityP290P(D>CJ=—」(其中Co表示每

7、过剩一个单位的能力成本,Cs表示每短缺一个单Cs+Co位的能力成本)注意:①根据P(D>e)=Cs+C。这个公式算出P(D>C*)②根据P(DC*)算出得到一个数③根据z=±二出，因为是服从正态分布，因此A知道均值和标准差，再根据笫二步算出的一个数查表找寻z值，最后得出X。例题：McDonaldhastodecidehowmanyseatstoprovideinanewMcDonaldinMianYang,themanagerknowthedemandinMianYangisnormallydistribute

8、dwithanaverageof200seatsperdayandastandarddeviationof15.Oneday,theMcDonaldhastoturnawayacustomerbecauseseatsareallocc