Although eXpress analyses can be used to assess the diagnostic capability of a fixed system design, eXpress really comes into its own when the results are used to improve a design’s diagnostic capability. Unlike spreadsheet-based approaches, eXpress has been specifically designed to facilitate both early and iterative analysis; in fact, it can be effectively employed throughout the product development cycle, beginning in the earliest phases of system design. The value of this early design feedback cannot be over-estimated—if diagnostic analysis is postponed until later phases of the design process, it becomes much less cost-effective to…
Read MoreThe concept of Design for Testability was originally pioneered by Ralph De Paul, Jr. in the mid 1960’s based on diagnostic ideas that he had first conceived during the 1950’s. Due to his involvement as an encryption specialist for the US Army during the Korean War in the early 1950’s, De Paul had experienced the traumatic loss of some of his fellow servicemen. It was later learned by De Paul that the loss of these soldiers was primarily due to the malfunctioning of their equipment, which apparently was not an uncommon scenario at that time.…
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