恳请各位大大帮小弟矫正一下

tonylee123

In an attempt to improve the overall performance ofclerical workers, many companies have introduced com-puterized performance monitoring and control systems(CPMCS) that record and report a worker's computer-(5) driven activities. However, at least one study has shownthat such monitoring may not be having the desired effect.In the study, researchers asked monitored clerical workersand their supervisors how assessments of productivityaffected supervisors' ratings of workers' performance. In(10) contrast to unmonitored workers doing the same work, whowithout exception identified the most important element intheir jobs as customer service, the monitored workers andtheir supervisors all responded that productivity was thecritical factor in assigning ratings. This finding suggested(15) that there should have been a strong correlation between amonitored worker's productivity and the overall rating theworker received. However, measures of the relationshipbetween overall rating and individual elements of perfor-mance clearly supported the conclusion that supervisors(20) gave considerable weight to criteria such asattendance.accuracy, and indications of customersatisfaction.It is possible that productivity may be a "hygienefactor." that is, if it is too low, it will hurt the overallrating. But the evidence suggests that beyond the point at(25) which productivity becomes "good enough." higherproductivity per se is unlikely to improve a rating.

这一篇文章我看很久,网络上也有一些版本,但这一题我的分析是第一个however作者语气 然后elaborate 之后作者下推论 然后第二个however是表对比 最后一段表让步然后作者再转回强调
不知道我分析的到底比对不对 希望各位大大能帮我矫正一下

不知道有没有人有gmat verbal的rc逐题分析