Instrument Redundancy vs Maintenance Effort
Apply redundancy only where SIL determination mandates it and use smart diagnostics to contain the resulting maintenance burden.
CyberTRIZ analysis · Seveso contradiction FS017 · one of 8,235 worked contradictions published by CyberTRIZ.AI
Regulations
Business Context
Redundant transmitters, switches, and detectors improve the availability
of Safety Instrumented Functions. Every additional device, however,
increases calibration, proof testing, spare parts, and maintenance
workload.
The Contradiction
Greater redundancy improves functional safety.
Greater redundancy increases maintenance effort.
Why It Exists
Each redundant component must be inspected, calibrated, tested,
documented, and maintained throughout its operational life.
Direction
Apply redundancy only where required by SIL determination and process
risk while using smart diagnostics to reduce unnecessary maintenance
activities.