1. BridgesWG WilliamsTR.Risk acceptance criteria and risk judgment tools applied worldwide within a chemical company. Paper presented at: International Conference and Workshop on Risk Analysis in Process Safety; October 21–24 1997 Atlanta GA: pp. 13–28. New York: American Institute of Chemical Engineers; 1997.
2. Dowell IIIAM.Layer of protection analysis: a new PHA tool after HAZOP before fault tree. Paper presented at: International Conference and Workshop on Risk Analysis in Process Safety October 21–24 1997 Atlanta GA: pp. 13–28. New York: American Institute of Chemical Engineers; 1997.
3. EwbankRM YorkGS.Rhône‐Poulenc Inc. Process hazard analysis and risk assessment methodology. Paper presented at: International Conference and Workshop on Risk Analysis in Process Safety October 21–24 1997 Atlanta GA: 61–74 New York: American Institute of Chemical Engineers; 1997.
4. IEC 61508.Functional safety of electrical electronic/programmable electronic safety‐related systems The International Electrotechnical Commission;2010.
5. IEC 61511.Functional safety: safety instrumented systems for the process industry sector ‐ part 1: framework definitions system hardware and software requirements International Electrotechnical Commission;2003.