How do we protect knowledge held by panel operators?

Short answer: write down what normal looks like on each unit, seat a named understudy at the console beside your veteran panelman, and clear the understudy against fixed stages. Then pay for the teaching, because goodwill alone runs out.

The longer answer starts with being honest about what the knowledge is. It is rarely a secret procedure. It is a feel for the screen. Agitator current creeps up an hour before a reactor runs hot. One level transmitter reads high every monsoon. A rising cooling water return says an exchanger is fouling. None of that sits in the operating manual.

• Normal bands, not alarm limits. The alarm fires once a temperature is already too high. The veteran knows the narrow band a good batch sits in, and spots the drift long before.
• Trend shapes. A pressure curve that flattens early, a jacket outlet that lags the inlet, a flow totaliser running slow against the dosing pump stroke.
• Instrument quirks. Which transmitter sticks, which thermocouple reads a shade off, which alarm is a nuisance and which one is never ignored.
• First moves. Trim the feed, open cooling, drop the setpoint, or send the field operator to look at a sight glass before trusting the faceplate.
• Who gets woken. The instrument technician for one fault, the shift in-charge for another, the plant head only for a very short list.

• Reactors: agitator amps, jacket inlet and outlet, the size and timing of the exotherm after each charge.
• Distillation columns: overhead temperature, reflux flow, reboiler steam and the vacuum the ejector holds.
• Dryers and evaporators: outlet temperature, vapour line pressure, condensate that backs up.
• Scrubbers: circulation flow and the pH that tells you the liquor is spent.
• Tank farm: level against dip, nitrogen blanket pressure, a high-level alarm that once failed to sound.

The format matters less than the habit. One card per unit suits most control rooms, because it mirrors how a panelman thinks about the plant. Write it alongside the veteran on a quiet night or during a planned shutdown. A meeting room produces tidy cards that nobody on the console trusts.

Unit name and the tag numbers this card covers.
Reading: what it measures and where it shows on the mimic.
Normal on a good day: the band, and the shape the trend usually takes.
Early sign of trouble: what the veteran notices first.
First move: the action for the opening minutes, and the one move never to make.
Call: who is woken for this, by role and by name.
Drafted by, checked by, date of last revision.
Understudy tested on this card: name, shift, date and result.

Expect each card to go through several drafts. Experts skip steps that feel obvious to them, so the first version is usually thin. An understudy reading it back aloud, at the console, finds those gaps within a shift or two.

An understudy is not whoever has glanced at the screen a few times. It is a field operator chosen for the role, rostered beside the veteran for agreed shifts and moved through stages. The staged training route for an industrial chemical site shows how those stages are planned and logged.

1. 1

   Watch and ask

   The understudy sits beside the veteran across days and nights, keeps a notebook and asks why each move was made.

2. 2

   Drive under eye

   The understudy works the console while the veteran watches, ready to take the mouse back at once.

3. 3

   Replay old upsets

   The veteran recounts a past trip or near-runaway. The understudy explains the first moves from the card, unit by unit.

4. 4

   Hold a quiet night

   The understudy runs the console alone while the veteran is on site, out of the control room, a radio call away.

5. 5

   Clear each unit separately

   The plant head or process lead signs off one unit at a time. Someone can be cleared on one reactor and still training on the column.

Veterans often hold back for a plain reason. Teaching takes effort, it appears in nobody's job description and, quietly, it can feel like training a replacement. Name the teaching in the role, count it at appraisal and reward it through the grade. A panelman who has cleared two understudies has made the plant safer than one who has cleared none, and the pay ladder should say so.

Some owners fear this raises the veteran's cost. It does, a little. Weigh it against a night when the one person who could read a unit is unreachable and the reactor is climbing.

Later than most owners plan for. A unit that runs steadily can be learned over a season of shared shifts. A unit with frequent grade changes or awkward start-ups takes longer, because the understudy needs to witness enough of them. Plan by start-ups, shutdowns and upsets seen, not by weeks on the calendar.

Find out what frightens him before you push. Typical answers are being replaced, losing overtime, or carrying the blame if the understudy slips. Each has a reply. Put in writing that his grade does not hang on being the only one. Keep him a fair share of console shifts after the understudy is cleared. And judge any later mistake against the sign-off, not against the teacher.

Spend the notice period on cards, not farewells. Agree a shortlist of the units that worry you most and ask for one card each, drafted with the understudy beside him. Book his last shifts at the console as paired shifts. The records side of a specialty chemical handover covers papers built to outlast an exit.

Test it. Hand a card to an operator new to that unit and ask for a walk-through of a past upset using only the card. If the walk-through stalls, the card is unfinished. Then count, unit by unit and shift by shift, how many people are cleared. Two is the floor. A cover chart laid out by unit and shift gives you somewhere to record it, and the hub page for chemical plants sets this beside handover, hazard habits and loading.

If you want help drafting the first cards or planning the understudy stages, tell us what the plant needs. The cheapest first step is free: ask your veteran panelman which reading he would teach a new hire first, and write the answer down.