System operators, maintainers and managers need to know the current and anticipated status of their systems and equipment, and whether the system will be able to perform its various functions and remain operational.

VSE's core technology is an expert system using model based reasoning that uses a design-based model for diagnostics and prognostics. It is a deterministic approach that uses "first principles" of design. The reasoner dynamically interprets input data to detect and anticipate faults, and to isolate faults to the repair item.

Troubleshooting Embedded Diagnostics Test Program Sets Prognostics Prognostics