So why do manufacturers keep on designing and producing VCRs that are awkward to use if the problems are so obvious. First, the problem we notice are not obvious to technically minded (有技术思想的) designers with years o[ experience and trained to understand how appliances work. Secondly, designers tend to add one or two features at a time to each model, whereas you or I face all a machine' features at once. Thirdly, although finding problems in a finished product is easy, it is too late by then to do anything about the design. Finally, if manufacturers can get away with selling products that are difficult to use, it is not worth the effort of any one of them to make improvements.
Some manufacturers say they concentrate on providing a wide range of features rather than on making the machines easy to use. But that gives rise to the question, "Why can't you have features that are easy to use?" The answer is you can.
Good design practice is a mixture of specific procedures and general principles. For a start, designers should build an original model of the machine and try it out on typical members of the public—not on colleagues in the development laboratory. Simple public trials would quickly reveal many design mistakes. In an ideal world, there would be some ways of controlling quality such as that the VCR must be redesigned repeatedly until, say, 90 per cent of users can work 90 per cent of the features correctly 90 per cent of the time.
The author had trouble operating his VCR because
A.he had neglected the importance of using the timer
B.the machine had far more technical features than necessary
C.he had set about using it without proper training
D.its operation was far more difficult than the designer intended it to be
第3题
酸碱类化学烧伤,急救处理首选的方法是
A.碱性溶液冲洗
B.中和剂冲洗
C.酸性溶液冲洗
D.清水冲洗
E.消毒液冲洗
第4题
酸碱类化学烧伤,急救处理首选的方法是
A.碱性溶液冲洗
B.酸性溶液冲洗
C.清水冲洗
D.中和剂冲洗
E.消毒液冲洗
第5题
酸碱的化学烧伤,急救首选()
A.酸性溶液冲洗
B.清水冲洗
C.碱性溶液冲洗
D.消毒剂冲洗
E.中和剂冲洗
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