ImmersaEngineering / Engineering second opinion
A second opinion on one question that has to be right.
The smallest engagement offered: a single defined question, answered in writing, by someone with no stake in the answer. Most often it is a number that has become load-bearing — a sizing, a relief case, a vendor claim — and the cost of it being wrong is much larger than the cost of checking it.
What it covers
One question, bounded and answered.
A second opinion is not a review of everything. It is a review of the thing that is worrying you. The scope is agreed in a sentence, and the answer states the basis it rests on so you can test it yourself.
Questions that come up most often
Each of these is a single, bounded question with a defensible answer, and each has a consequence that outruns the cost of asking.
- Whether an equipment sizing or rating holds at the stated duty
- Whether the governing relief case has been correctly identified
- Whether a relief valve or rupture disc is correctly sized and selected
- Whether a vendor performance guarantee is achievable as written
- Whether a line size, pressure drop or flow regime assumption survives at turndown
- Whether a stated design margin is real or has already been consumed
When a technical disagreement needs settling
Where two competent parties disagree, an opinion from outside the dispute is often cheaper and faster than escalation.
- A disagreement between client and contractor on a technical position
- A disagreement between disciplines on an interface assumption
- A challenge to a figure raised late in review
- A position that has to be defended to a board, an insurer or a regulator
How it is delivered
The fastest route into the firm.
A second opinion is the most common way clients start, because it is the easiest to bound: one question, one document set, one written answer.
What is needed to start
The question itself, and the documents that carry it — a calculation, a datasheet, a vendor quotation, an extract from a design basis. Rarely more than a handful of files.
A mutual non-disclosure agreement is executed before any of it is exchanged.
What comes back
A written opinion stating the answer, the basis it rests on, the assumptions relied on, and what would have to change for the answer to change.
Where the honest answer is that the original position is sound, that is what the opinion says.
Typical findings
What a second opinion turns up.
Illustrative and non-attributable. Each is invented; no engagement lies behind any of them.
- A relief case sized against the wrong governing scenario. External fire, not blocked outlet, set the required area — the specified orifice was one size short. Raised ahead of procurement, while changing it was still a paperwork exercise.
- A vendor guarantee written against conditions the plant will not see. The performance figure held at the reference case and nowhere in the operating envelope the unit was actually bought for.
- A margin that had already been spent. The design margin quoted in the basis had been consumed by three earlier revisions, each defensible on its own, none of them recorded against the margin.
- A number that was right. The original position held and the opinion said so. The value was in being able to proceed with the disagreement closed rather than parked.
Invented for illustration. Nothing arising from a real engagement is reused, retold or cited as a credential.
See the deliverable
Read one before you commission one.
The specimen is exactly this deliverable: an independent review of a solvent recovery column and its relief system, seventeen pages, six findings ranked by consequence.
It carries the assumptions relied on, a sensitivity table, the items examined and found sound alongside those that were not, the residual risk that remains after the recommended actions, and a passage setting out where the conclusion could be wrong. Every page is marked SPECIMEN; the facility, the client and the findings are invented.
Put one question to an independent reviewer.
A short description of the problem, the document set or the decision is enough to confirm suitability, propose a structure and give an indicative cost. A mutual non-disclosure agreement is executed before technical detail is exchanged.
Discuss a requirement