Being an information technology, or IT, worker is not a job I envy. They are the ones who, right in the middle of a critical meeting, are expected to instantly fix the projector that’s no longer working. They have to tolerate the bad tempers of colleagues frustrated at the number of times they’ve had to call the help desk for the same issue. They are also the ones who know there are systems that are more powerful, reliable and faster, but their employer simply will not put up the funds to buy them.

        According to a recent survey, employees who have a job reliant on IT support consider IT a major source of job dissatisfaction. Through no fault of their own, they can suddenly find their productivity deteriorating or quality control non-existent. And there’s little they can do about it.

        The experience of using IT penetrates almost the entire work field. It has become a crucial part of employees’ overall work experience. When IT is operating as it should, employee self-confidence swells. Their job satisfaction, too, can surge when well-functioning machines relieve them of dull tasks or repetitive processes. But if there’s one thing that triggers widespread employee frustration, it’s an IT transformation project gone wrong, where swollen expectations have been popped and a long list of promised efficiencies have been reversed. This occurs when business leaders implement IT initiatives with little consideration of how those changes will impact the end user.

        Which is why managers should appreciate just how influential the IT user experience is to their employees, and exert substantial effort in ensuring their IT team eliminate programming errors and application crashes. Adequate and timely IT support should also be available to enable users to cope with technological issues at work. More importantly, IT practitioners need to understand what employees experience mentally when they use IT.

        Therefore, businesses need to set up their IT infrastructure so that it is designed to fit in with their employees’ work, rather than adjust their work to fit in with the company’s IT limitations.

解析：D。根据题干中的when IT is functioning properly可定位至原文第三段。该段第三句指出，当信息技术发挥应有的作用时，员工的自信心就会增强。题干中的when IT is functioning properly对应该句中的When IT is operating as it should，而D项则是对该句后半部分employee self-confidence swells的同义改写，故D项符合题意，为正确答案。

错项排除：原文中并没有提到信息技术运转得当会大大提升员工的工作效率，或是让人们越来越依赖机器，故排除A项和B项。原文中虽然提到，运转良好的机器会使员工从枯燥的工作或重复的流程中解放出来，但此处的relieve只有“减轻”的意思，并不说明将不再会有任何无聊或重复性的任务，C项说法过于绝对，故排除。