Functional Safety 2016

Conclusions

• RACI Matrix for each and every document in the Safety Lifecycle, especially

where there is multi-discipline input.

• Develop SIL assessment Terms of Reference, with criteria and corporately

approved figures for parameters including human error rates and ignition

probabilities.

• Clearly described scenarios, especially for complex scenarios where operator

error is the Initiating Event; HAZOP may not fully provide this.

• Process modelling of overpressures in advance of the SIL assessment

• Develop a Process Safety Time Terms Of Reference

• Develop a SRS template applicable to your applications

• Verification processes should check that Operating Procedures describe the

same procedure assumed in SIL assessment.

• For high integrity Inhibit SIFs, consider a hardwired inhibit, or even both a soft

and hard inhibit.