R&M Design Expert System.
Abstract
This effort investigated and developed a proof-of-concept software system that combines reliability, testability, and maintainability analysis capabilities into a single tool. The system recommends tests and testpoints based on potential faults (associated with a component within the design) and a functional-block description of the design. The system directs the user in injecting faults into a simulation model. The tests and testpoints are then used to perform fault isolation using the results of the simulation. Case-based reasoning techniques were used as a basis for the testability and test coverage aspects of the program. The casebase is a repository of "past knowledge" gained from expert designers and testability experts. The system adds to this repository if an unfamiliar situation occurs, allowing the system to "learn" over time. The expert knowledge was encoded into a Fault Mode Map that represents how the experts relate faulty behavior of the circuits to actual failures. Rome Laboratory Oracle (a reliability prediction tool), Mentor Graphics design Architect (a schematic capture tool), and Analogy Saber (a circuit simulation tool) were integrated to allow the user to exercise all system capabilities from a single user perspective. The system was tested against Martin Marietta power supply design.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1994
- Accession Number
- ADA292525
Entities
People
- Angela M. Kitchen
- Doug Doskocil
- Eric C Freeman
- Glenn Elias
- Jeff Steelhammer
Organizations
- Martin Marietta