In the design of electronic equipment, reliability is one of many requirements, such as weight, size, cost, power input and performance which must be given adequate attention in arriving at the most effective product. Like most other characteristics, reliability is a feature which must be given due attention at all phases of the design, and cannot satisfactorily be added on after the prototype stage has been reached. It is, however, useful to consider the problem of designing reliable equipment under four headings, system design, circuit design, choice of components and mechanical design, including packaging and assembly methods.
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