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The use of redundant avionic architecture on modern aircraft for both Flight Control and Mission Management has intensified the requirements for Condition Monitoring of Critical Control and Computational functions. The Application of a REAL-TIME EXECUTIVE MODULE (RTEM) provides a core element of detection for departures from norm or nominal expected performance in such systems. The RTEM performs all Fault Tolerant operations and functions including Fault Tolerant Communication, Inter-Lane Control, Synchronization, Real-Time Task Scheduling, Data Voting, Message Error Checking, Error Detection and Reporting, Graceful Degradation, Dynamic System Reconfiguration and Application Interface Specifics.