Engineering guide
Write a testable safety-function specification
Start with the hazardous event and the intended response.
Reviewed 2026-11-04 · Engineering interpretation · authoring reviewed
Define the boundary
For an original design worksheet, give each function a stable ID. State the hazard, persons exposed, operating mode, initiating condition, controlled equipment, required response and safe state. Include a bounded response time only when its basis is available. Identify relevant robot and integration standards by edition.
Connect to a test
Add fault behavior, reset and restart conditions, assumptions and an observable acceptance criterion. For example, the guard-door case has separate stop and restart-inhibition records. A reviewer should be able to connect each requirement to an analysis or a proposed test and see which input is still missing.
Sources & editions
Robot Safety Forum original engineering notes
Initial publication edition 2026-11-04
Original specification worksheet method
OSHA Technical Manual, Section IV Chapter 4 ↗
Web edition checked 2026-11-04
VII.3 RA Implementation, Validation, and Review