The Testability Analysis sub-module of the FMECA module is intended for in-depth Testability analysis. The main characteristics of Testability - BIT/Detection Coverage and Fault Isolation Resolution - can be calculated for each maintenance level (Organizational, Intermediate, Depot) and for specific detection methods (BIT, BITE, external test equipment, etc.). Test method efficiency and indication are defined for each test method or a group of test methods.

Testability analysis is widely used for the development of necessary supporting documentation: maintenance manuals, troubleshooting procedures and inspection requirements.