The following appeared in a letter from the owner of the Sunnyside Towers apartment complex to its manager.
“One month ago, all the showerheads in the first three buildings of the Sunnyside Towers complex were modified to restrict maximum water flow to one-third of what it used to be. Although actual readings of water usage before and after the adjustment are not yet available, the change will obviously result in a considerable savings for Sunnyside Corporation, since the corporation must pay for water each month. Except for a few complaints about low water pressure, no problems with showers have been reported since the adjustment. I predict that modifying showerheads to restrict water flow throughout all twelve buildings in the Sunnyside Towers complex will increase our profits even more dramatically.”
Write a response in which you discuss what questions would need to be answered in order to decide whether the prediction and the argument on which it is based are reasonable. Be sure to explain how the answers to these questions would help to evaluate the prediction.
五問(wèn):
(1)“One month ago, all the showerheads in the first three buildings of the Sunnyside Towers complex were modified to restrict maximum water flow to one-third of what it used to be. Although actual readings of water usage before and after the adjustment are not yet available”和“the corporation must pay for water each month. Except for a few complaints about low water pressure, no problems with showers have been reported since the adjustment”是事實(shí),“I predict that modifying showerheads to restrict water flow throughout all twelve buildings in the Sunnyside Towers complex will increase our profits even more dramatically”是結(jié)論,值得反駁嗎?
(2)減少最大用水量,就意味著總用水量一定會(huì)下降嗎?是否可能存在這樣的情況:因?yàn)樽畲蟪鏊孔冃×?,人們不得不在淋浴時(shí)花費(fèi)更長(zhǎng)的時(shí)間,從而導(dǎo)致用水量更多?另外,淋浴用水占總用水量的比例是多少呢?可能洗衣服消耗的水比淋浴更多,那么只限制淋浴用水量并不能節(jié)約多少水費(fèi)。
(3)水費(fèi)只是諸多費(fèi)用之中的一個(gè),利潤(rùn)還可能由哪些因素決定?你能具體地羅列一下嗎?并說(shuō)說(shuō)這些因素將如何影響利潤(rùn)。例如:利潤(rùn)應(yīng)該主要靠賣(mài)房和租房來(lái)獲取,水費(fèi)僅僅是其中很小的一部分費(fèi)用。
(4)沒(méi)有抱怨就意味著人們一定是滿意的嗎?是否可能存在這樣的一些人,他們雖然沒(méi)有說(shuō)出來(lái),但心中非常地不滿意。這樣是否可能會(huì)得不償失呢?
(5)把前三棟樓的政策推廣到其他樓房,就能獲得相同的效果嗎?住在不同樓里的居民的偏好是否可能并不一樣,從而導(dǎo)致不一樣的結(jié)果呢?對(duì)于喜歡用浴缸的居民來(lái)說(shuō),改良 showerheads也是沒(méi)有效果的。
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