Pulled under a permit that relied on another permit's isolations, so nobody called the area operator.
Shift handover software at work: the permit the log never mentioned
Sales gas and condensate, day shift to night shift at 18:00. The flash gas compressor ran hot three times today, and its standby is the machine the crew would reach for tonight. Nobody in the control room knows its relief valve is at the shop.
demoInvented for the sample: the gas plant, its tags and permits, the crew and every count.
- 0117:40
All 10 log items have crossed, and the operator does not leave yet
Off-going control room operatorThe screen splits into his day side and the lead's night side, with a clock to 18:00 on the line between them. Each item from his log crossed only when she opened it and accepted it. The records checker still has to read six more sources against his log, so he stays at the console.
- 0217:41
13 records against 31 log lines, and 3 things the log left out
Off-going control room operatorAgents read the permit system, the bypass register, the alarm system, work orders and standing orders against what he wrote. Four records have no line that covers them, about three things: two permits on the standby compressor, a flash drum alarm on the shelf and a tank valve bypass. Each comes back to his side with how sure the agent is, from 97% down to 71%.
- 0317:41
A permit pulled the relief valve at 08:10, and operations was never called
Off-going control room operatorThe item puts the sources beside each other. The desk issued the permit at 08:10, relying on isolations already held under another permit on the same machine, so the area operator never countersigned. At 15:20 the mechanic suspended it with the valve at the shop until Thursday and an untested blank on. The other permit says work not started.
- 0417:42
The answer box starts empty, and the words are his
Off-going control room operatorThe agent asks one plain question: is that still how it stands? He writes that it is still out and the shop has it till Thursday. If he wanted to say the record was wrong, he would need a reason and evidence, and the field operator would have to confirm it on site. An open permit cannot be cleared on his word.
- 0517:42
She reads it back by tag and writes the hold herself
On-coming shift leadThe lead opens the item, sees his words under the agent's question and reads it back in hers: relief valve out of C-2823, blank on. A read-back must name the tag or its state, so filler or a copy of his words is refused. She then writes what must not be done tonight, which becomes the hold: do not start C-2823.
- 0617:42
The line-up on the standby compressor stops on the field screen
Area field operatorUntil she accepted the item, the task to line up the standby compressor if called was live on his round. Now it reads stopped, with her name and her words, and the start button is off. The stop reaches the person it applies to, where he works, instead of a clipboard in the control room.
- 0717:42
The bypass the agent is least sure of, at 71%
On-coming shift leadThe register shows a tank vapor valve limit switch bypassed at 09:30, with no removal entry. A stuck indicator is often cleared on the same shift and written up late, so the agent says it is less sure. The operator confirms it is still on. Had he said it was off, he would need evidence and a field check before it crossed.
- 0817:43
13 of 13 crossed, and only then can she take the shift
On-coming shift leadShe reads back the bypass and the shelved alarm in her own words, one at a time; the alarm comes back from the shelf at 19:10. Every item now sits on her side, the three the agents found marked as found. There is no accept-all and no accept on the row. The take button appears once nothing is left on his side.
- 0917:43
She holds the shift with 3 items the log left out and 1 hold on
On-coming shift leadAt 17:43 the clock closes. On the night side: 13 items crossed, 3 the log left out and 1 hold on, with the hold above them all. Only now is the off-going operator released, and the evidence clerk seals the record with both people's words and the time of each.