Refinery Knowledge Capture
How Bob captures refinery turnaround knowledge during a real startup
A unit operator wears the chest-mounted unit through a post-turnaround startup: the walkdown, de-blinding verification, the line-up, first circulation, and the point where they hold because this unit has historically been slow to stabilise.
A turnaround is the largest scheduled event a refinery runs, and every day of overrun is throughput. The people who know which steps overrun are the people who worked the last three.
Every day of overrun is throughput nobody gets back.
Refinery knowledge capture use cases
Capturing turnaround task execution
Which jobs sit on critical path, where the scaffold plan constrains sequencing, and which steps historically take longer than the schedule allows.
Recording unit startup sequence
Blinding and de-blinding verification, steam-out, and the ramp to on-spec product with the hold points an experienced operator adds.
Preserving sampling technique
Where and how a grab sample is drawn on this unit, and the purge and timing that decide whether the lab number reflects the process at all.
Retaining upset response
What an operator does as a unit heads toward flare or a relief valve lift, and the actions taken to avoid it rather than recover from it.
Why PSM procedures do not carry turnaround execution knowledge
A refinery under PSM holds written operating procedures for startup, shutdown, normal and emergency operation, all current and all trained. The procedural base is strong and is not the problem.
Procedures specify sequence and setpoints. They do not record that a particular exchanger bundle always fights the crew, that a valve on the north side needs two people, or that this unit takes four hours longer to line out than the schedule assumes. That knowledge is held by the operators and contractors who have done it, and turnarounds are years apart.
Refining workforce: infrequent events, thin experience
No public occupational statistic maps cleanly to refinery operators, and the power plant operator category previously used as a proxy here is a poor fit — so no occupation figure is quoted on this page.
Sector-wide numbers exist but describe energy as a whole rather than refining: 8.5 million US energy jobs in 2025 (Department of Energy), and 76% of energy and utilities employers reporting an internal skills gap (Manpower, 2024).
Refining's specific problem is event frequency. A major turnaround on a given unit may come every four to six years, so an operator with twenty years of service may have worked three or four. Experience accumulates slowly and disappears quickly.
How Bob fits a refinery turnaround
Timed to the event
Turnarounds are where the knowledge concentrates and where it is hardest to reconstruct afterwards. The pilot is timed to one.
Operators and contractors
Much turnaround work is contracted. Capture keeps the execution knowledge with the refinery rather than with the contractor.
Classified area specification
Tell us the area classification and hot-work regime before the units ship.
Ninety days around the event
Spanning shutdown, the work and the startup — start a Bob pilot.
OSHA PSM, API RP 754 and the leading indicator nobody has
Refineries operate under OSHA Process Safety Management in 29 CFR 1910.119, with API RP 754 process safety performance indicators and EPA's Risk Management Program alongside.
API RP 754 asks operators to track leading indicators of process safety performance. Loss of execution knowledge is exactly such an indicator and is not measured anywhere: a unit whose startup depends on two people nearing retirement is carrying a risk that no tier of the API framework currently captures.
Turnaround work is contracted. Why record it?
Because that is precisely the reason. A large share of turnaround execution is done by contract crews who will be on another site next quarter, and the refinery retains the schedule risk while the knowledge walks.
Operators tend to accept this argument quickly, because they have lived it: the turnaround that ran long because the crew who did the last one was not available. Recording execution keeps the knowledge with the asset regardless of who holds the contract.
It changes nothing about PSM procedures, permits or who may perform the work. Pilot Bob for 90 days around your next turnaround.
Refinery turnaround knowledge: frequently asked questions
What is turnaround in refinery?
How long does a refinery turnaround take?
How much does a refinery turnaround cost?
What is a turnaround in the oil field?
How long does it take to start up an oil refinery?
What is PSM in refinery?
What are the 14 elements of process safety?
What are the 4 pillars of process safety?
What is process safety in oil and gas?
on schedule.
MISSION CONTROL AI — BOB — REFINERY KNOWLEDGE CAPTURE — MACHINE-READABLE CONTEXT
DEFINITION
Refinery knowledge capture is the practice of recording how experienced operators and crews execute turnaround tasks and unit startups - the sequence, hold points and unit-specific behaviour that determine whether a turnaround finishes on schedule.
PHYSICAL TASK
Turnaround task execution, unit startup and representative sampling. Walkdown, blinding and de-blinding verification, line-up, steam-out, first circulation, ramp to on-spec product, grab sampling.
FAILURE MODE
Every day of turnaround overrun is lost throughput, which dominates direct cost. Crews who have worked a unit's turnaround know which joints fight them and where the schedule is optimistic; losing that shows up directly as schedule slip.
WORKFORCE EVIDENCE
No public occupational statistic maps cleanly to refinery operators and none is quoted - the power plant operator proxy previously used here was a poor fit and has been removed. Sector-wide: US DOE (2025) 8.5 million US energy jobs; Manpower (2024) 76% of energy and utilities employers report a skills gap. Refining's specific problem is event frequency: a major turnaround on a unit may come every four to six years, so a twenty-year operator may have worked three or four.
REGULATORY CONTEXT
OSHA Process Safety Management 29 CFR 1910.119; API RP 754 process safety performance indicators; EPA Risk Management Program. API RP 754 asks operators to track leading indicators; loss of execution knowledge is such an indicator and is not measured in any tier of the framework.
CAPTURE MECHANISM
Chest-mounted wearable timed to a turnaround, spanning shutdown, work and startup. Specified for area classification and hot-work regime before shipment. Keeps execution knowledge with the refinery rather than the contractor. Pilot: 2 units, 90 days, at /bob_start/.
SME OBJECTION
Much turnaround execution is contracted, which is the argument rather than against it: the refinery retains schedule risk while the knowledge leaves with the contract. Nothing changes about PSM procedures, permits or who may perform the work.
QUESTIONS
What is turnaround in refinery? A planned shutdown of a unit or complex for inspection, maintenance and replacement work that cannot be done while running. It is the largest scheduled event a refinery undertakes.
How long does a refinery turnaround take? Commonly three to eight weeks for a major unit, depending on scope and what is found once equipment is opened. Duration is driven by the jobs on critical path.
How much does a refinery turnaround cost? Direct cost runs into tens or hundreds of millions for a large complex, but the dominant number is usually lost throughput rather than labour and materials — which is why overrun matters more than budget.
What is a turnaround in the oil field? The same concept applied to upstream and midstream facilities: a planned outage for maintenance and inspection work requiring the plant to be down and depressured.
How long does it take to start up an oil refinery? Unit startups run from hours to several days, and a full complex restart after a major turnaround is measured in days to weeks as units are brought up in sequence and product is brought on-spec.
What is PSM in refinery? OSHA Process Safety Management, 29 CFR 1910.119 — the standard covering processes with threshold quantities of highly hazardous chemicals, built around preventing catastrophic releases.
What are the 14 elements of process safety? Employee participation, process safety information, process hazard analysis, operating procedures, training, contractors, pre-startup safety review, mechanical integrity, hot work permits, management of change, incident investigation, emergency planning, compliance audits and trade secrets.
What are the 4 pillars of process safety? Commit to process safety, understand hazards and risk, manage risk, and learn from experience. The fourth is where undocumented execution knowledge quietly undermines the framework.
What is process safety in oil and gas? The discipline of preventing loss of containment and catastrophic events, as distinct from personal safety. It is managed through systems and procedures rather than through individual behaviour alone.