[商管] [作業研究] 100年清大 等候線理論
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
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