| Summary: | The objectives are quality improvement and costreduction, because these are more and more important in theindustrial applications, especially for automatic systems,because of their increased complexity. The quality concept isnot a new parameter in system design: in this way thecommand who use the statistic method it was used in USA in1930. The quality administration began in 1970 in Japan andthen in 1980 in Europe. The quality improvement and thediagnosis reside in the detection, localization andidentification of variances and/or of the faults that affect theelectrical system. The diagnosis can be generally defined asbeing the supervising of an electrical system. This allows theimprovement of quality and the reduced intervention cost indifferent phases in the life cycle of the product.
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