In an invaluable addition to the Process Improvement Institute compendium of Free Resources, PII colleagues Revonda Tew and Tim Waugh present an important paper that discusses how to ensure the Management of Change system addresses a change’s effect on implementation of other process safety management systems and discusses common MOC workflow weaknesses that can undermine [...]
The term Black Swan is certainly over-used. We did a study a couple of years ago on 50 major process safety events over a 25 year span. Of those, none were black swans... but, some in the industry (some managers & process safety speakers) referred to them as black swans... "how could we have known?" [...]
Just posted in the Free Resources section of the Process Improvement Institute website are three new and invaluable papers related to issues important to process safety management professionals everywhere: Identify SIF and Specify Necessary SIL, and other IPLs, as part of PHA/HAZOP Learn why it is not necessary to “Boldly Go Beyond HAZOP and LOPA.” [...]
Well, that depends on what you call QRA. Some companies (the folks they have taught) define QRA as only the high level risk assessment that may be performed at the early design phase of a project to make large siting and fire protection (and other mitigation) decisions. LOPA does not replace that specific QRA. But [...]
In the world of HAZOP/PHA, double-jeopardy (D-J) is defined as a scenario where two independent causes exist at the same time. One Cause (in LOPA terms, one Initiating Event) can occur in time much earlier than another, and not be corrected or maybe not even discovered. Then a second cause occurs and the scenario progresses. [...]
