Transient
How do transients differ from intermittent faults?
Transients occur once and vanish, such as a bird blocking a microwave beam; intermittent faults are cyclic, such as loose connections causing repeated failures.
What percentage of system faults are transient?
80–90% of faults in distributed control or computer systems are transient, mainly from random high-energy particle strikes or environmental noise.
Can transients become permanent?
Yes; repeated transient-induced degradation, such as voltage spikes, can escalate to permanent faults as equipment deteriorates.
In reliability engineering and CMMS, a transient is a temporary, self-correcting fault caused by environmental or external disturbances such as network blips, voltage spikes, or momentary rate limits. It disappears without permanent damage, allowing the system to resume normal operation after a retry or short delay.
In predictive maintenance, transients are logged as intermittent alarms, such as motor voltage spikes or sensor noise, that do not trigger immediate shutdowns but are flagged for pattern analysis to detect escalating issues. In CMMS workflows, transients are handled via automated retry logic and exponential back-off strategies to avoid overloading systems during temporary outages. On the shop floor, technicians monitor transient voltage or current deviations, lasting nanoseconds to milliseconds, from switching, lightning, or ESD to prevent equipment degradation.
Treating transients as permanent: Ignoring retry logic and replacing hardware unnecessarily, such as swapping a sensor due to a one-time network glitch, increasing costs.
Missing transient patterns: Failing to log transient spikes in CMMS, leading to undetected degradation, such as repeated voltage transients weakening circuit insulation.
Inadequate protection: Skipping IEEE/IEC transient standards like IEEE 1159 or IEC 61000, causing destructive high-energy disturbances to damage electronics.