System testability analyses in the Space Station Freedom program

A testability analysis of the integrated Space Station Systems preliminary design was performed using the Harris Corporation's System Testability Analyzer (HSTA), a computer-based system testability analysis tool. The results of this analysis are useful for providing preliminary indicators of the station-level testability and identifying potential fault detection and/or isolation shortfalls inherent in the design. A review of the concepts and approaches available for testability analysis is given, and the specifics of the Space Station Freedom integrated-systems testability analysis follow. A summary and conclusions derived are detailed.<>