Im familiar with the incident and a dozen more as Part of our
competency program related to SHE. What ive said is not even near to
what happen at Flexiborough. The last paragraph of my response is
pretty much clear.
When a proposal is being made for a plant change such as piping work addition or mods or any work related to capital project, the very first thing that is needed is a justification - because resources will obviously have to be expended or it may have an impact on SHE or production.
Project justification or request for plant change these days require an estimate before committing more resources - to see if its worth pursuing then management need to rank it and of course allocate resoruces if approved and after a project plan. The project plan (im using a term that makes sense to most) will normally include a risk assessment, a HazOp and others in addition to ROI evaluation.
Like Ive said, an estimate is just an estimate. Need to pass more gates to make the estimate a reality. The keeper of these gates are experienced/license descipline engineers and managers familiar with the SHE requirement - either mandated by law or following generally accepted engineering practice.
In my book, A prelim calc is not a license to proceed. Meaning theres no committment, no labor or material, no construction details, no scope of work. In short, no ka-boom.
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