[商管] [作業研究] 100年清大 等候線理論

看板Grad-ProbAsk作者 (攝影是一種生活)時間14年前 (2012/02/06 00:43), 編輯推噓0(000)
留言0則, 0人參與, 最新討論串1/2 (看更多)
今天寫清大考古題的時候,有一題的答案感覺很怪,想請有考作業研究的版友們解惑XD 100年清大,作業研究,第六題,題目如下 Machinists who work at a tool-and-die plant must check out tool from a tool center. An average of ten machinists per hour arrive seeking parts. At present, the tool center is staffed by a clerk who takes an average of 5 minutes to handle each request for tools. Since machinists are paid $10 per hour, each hour that a machinist spends at the tool center costs the company $10. The company is deciding whether or not it is worthwhile to hire (at $4 per hour) a helper for the clerk. If the helper is hired, the clerk will take an average of only 4 minutes to precess requests for tools. Assume that service and inter-arrival times are exponential. Based on the cost analysis, should the helper be hired? 這是一題M/M/1的等候線考題 補習班給的答案上面寫著 原方案: 每個工人的時薪Cr是10元,顧客的等候成本Cw也是10元 λ=10(位/小時) μ= 12(位/小時) 總成本= 1*10+10*(10/20-10)=60元/小時 只是我在題目敘述一直找不到「顧客的等候成本Cw也是10元」這項資訊, 是我英文太爛了嗎?還是答案寫錯?還是我解題方向錯了? 以上問題,拜託大家了!我想了一個晚上....囧 感激不盡 只是我在題目敘述當中一直找不到 -- http://www.wretch.cc/album/carthage 底片攝影不只是攝影,更是一種生活方式。 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 219.70.77.105
文章代碼(AID): #1FBh74qz (Grad-ProbAsk)
文章代碼(AID): #1FBh74qz (Grad-ProbAsk)