STEED-a testability enhancement expert design system

摘要

A description is given of STEED (testability enhancement expert design system) which has been built to perform testability analysis and design rule checking on circuit board designs at an avionics firm. STEED is able to identify correctly several common circuit features which make a circuit untestable (or are bad design practice). STEED provides a measure of 'expert' advice at a low time and effort overhead to the design engineer. It automates the testability design process and helps to ensure that a circuit meets the testability design rules.