運(yùn)營(yíng)管理課后習(xí)題答案-資料下載頁(yè)
2025-06-19 21:06本頁(yè)面
【正文】 TC495 =495($2) +4,900($50) + $(4,900) = $25,4902495TC1,000 =1,000($) +4,900($50) + $(4,900) = $25,49021,000TC4,000 =4,000($) +4,900($50) + $(4,900) = $27,99124,000TC6,000 =6,000($) +4,900($50) + $(4,900) = $29,62626,000495 497 500 503 1,000 4,000 6,000QuantityTCHence, one would be indifferent between 495 or 1,000 units22. d = 30 gal./day ROP = 170 gal. LT = 4 days, ss = ZsLT = 50 galRisk = 9% Z = Solving, sLT = 3% Z = , ss= x = gal.Chapter 13 JIT and Lean Operations1. N = ?N =DT(1 + X) D = 80 pieces per hourC T = 75 min. = hr.=80() () = 3 C = 4545 X = .354. The smallest daily quantity evenly divisible into all four quantities is 3. Therefore, use three cycles.ProductDaily quantityUnits per cycleA2121/3 = 7B1212/3 = 4C33/3 = 1D1515/3 = 55. a. Cycle 1 2 3 4A 6 6 5 5B 3 3 3 3C 1 1 1 1D 4 4 5 5E 2 2 2 2b. Cycle 1 2A 11 11B 6 6C 2 2D 8 8E 4 4c. 4 cycles = lower inventory, more flexibility 2 cycles = fewer changeovers7. Net available time = 480 – 75 = 405. Takt time = 405/300 units per day = minutes.Chapter 15 Scheduling6.a.FCFS: A–B–C–DSPT: D–C–B–AEDD: C–B–D–ACR: A–C–D–BFCFS:Job timeFlow timeDue dateDaysJob(days)(days)(days)tardyA1414200B1024168C7311516D 6 3717 203710644SPT:Job timeFlow timeDue dateDaysJob(days)(days)(days)tardyD66170C713150B1023167A 14 3720 17377924EDD:Job timeFlow timeDue dateDaysJob(days)(days)(days)tardyC77150B1017161D623176A14 3720 178424Critical RatioJobProcessing Time (Days)Due DateCritical Ratio CalculationA1420(20 – 0) / 14 = B1016(16 – 0) /10 = C715(15 – 0) / 7 = D617(17 – 0) / 6 = Job A has the lowest critical ratio, therefore it is scheduled first and pleted on day 14. After the pletion of Job A, the revised critical ratios are:JobProcessing Time (Days)Due DateCritical Ratio CalculationA–––B1016(16 – 14) /10 = C715(15 – 14) / 7 = D617(17 – 14) / 6 = Job C has the lowest critical ratio, therefore it is scheduled next and pleted on day 21. After the pletion of Job C, the revised critical ratios are:JobProcessing Time (Days)Due DateCritical Ratio CalculationA–––B1016(16 – 21) /10 = –C–––D617(17 – 21) / 6 = – Job D has the lowest critical ratio therefore it is scheduled next and pleted on day 27. The critical ratio sequence is A–C–D–B and the makespan is 37 days. Critical Ratio sequenceProcessing Time (Days)Flow timeDue DateTardinessA1414200C721156D6271710B10371621S9937b.FCFSSPTEDDCRc. SPT is superior.9. Time (hr.)Sequence of assignment:OrderStep 1Step 2A.80[C]last (or 7th)B.90[B]firstC[A]2ndD[G]3rdE[E]4thF[D]6thG[F]5thThus, the sequence is . 若不給自己設(shè)限，則人生中就沒(méi)有限制你發(fā)揮的藩籬。2. 若不是心寬似海，哪有人生風(fēng)平浪靜。在紛雜的塵世里，為自己留下一片純靜的心靈空間，不管是潮起潮落，也不管是陰晴圓缺，你都可以免去浮躁，義無(wú)反顧，勇往直前，輕松自如地走好人生路上的每一步3. 花一些時(shí)間，總會(huì)看清一些事。用一些事情，總會(huì)看清一些人。有時(shí)候覺(jué)得自己像個(gè)神經(jīng)病。既糾結(jié)了自己，又打擾了別人。努力過(guò)后，才知道許多事情，堅(jiān)持堅(jiān)持，就過(guò)來(lái)了。4. 歲月是無(wú)情的，假如你丟給它的是一片空白，它還給你的也是一片空白。歲月是有情的，假如你奉獻(xiàn)給她的是一些色彩，它奉獻(xiàn)給你的也是一些色彩。你必須努力，當(dāng)有一天驀然回首時(shí)，你的回憶里才會(huì)多一些色彩斑斕，少一些蒼白無(wú)力。只有你自己才能把歲月描畫(huà)成一幅難以忘懷的人生畫(huà)卷。
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