Proof Test Coverage vs Operational Downtime
Adopt partial stroke testing and automated diagnostics to achieve required SIL proof-test coverage with minimal process downtime.
CyberTRIZ analysis · Seveso contradiction FS011 · one of 8,235 worked contradictions published by CyberTRIZ.AI
Regulations
Business Context
Proof testing verifies that Safety Instrumented Functions will operate
correctly when demanded. Comprehensive testing increases confidence in
system integrity but often requires equipment isolation, process
interruptions, or temporary impairment of protective functions.
The Contradiction
More comprehensive proof testing improves functional safety.
Longer proof testing increases operational downtime.
Why It Exists
Complete proof tests frequently require manual verification of sensors,
logic solvers, and final elements, reducing equipment availability
during maintenance.
Direction
Increase proof test efficiency through partial stroke testing, automated
diagnostics, online verification, and optimized test intervals based on
SIL requirements.