Design, production and site teams speak different languages: a fix for electrical makers

A commissioning engineer is in a pump house at nine at night. The terminal numbers in the marshalling section do not match the drawing folded in his bag. He rings the factory. The wireman says he worked to revision C. The design engineer says revision D went out last Tuesday. Everyone believes they are blameless, and the client's operator is tapping his watch.

The electrical equipment people guide lists this as its fifth pattern. Engineers draw, shop hands build and site crews commission. Each group works hard. The cracks run between them.

• Drawing to bench: revisions issued after wiring starts, with clouds the wireman never sees because an old print is still taped inside the cubicle door.
• Estimate to bench: hours quoted by someone who has not watched a fitter wrestle a crowded gland plate.
• Bench to test: a cubicle reaches the bay with no marked-up drawing showing what was altered on the fly.
• Factory to site: the crew receives the board but not the redlines, the test sheet or the punch list.
• Site back to factory: faults found during loop checks are fixed with a screwdriver on the spot and never reported.

Rework is the visible bill. A cubicle rewired for a late revision, or a fault traced at site, burns hours nobody priced. Shipping splits that arrive with mismatched interconnection cables add a second trip.

The hidden bill is blame. Wiremen scolded for drawing errors stop raising doubts. Site engineers left to apologise for factory slips tire of living out of a bag. Skilled wiring technicians often resign over this rather than salary. They want their work judged against what they were handed.

• Nobody owns the seam. Each team guards its own stretch, and the boundary belongs to no one.
• Revisions travel by email and memory. The bench may still hold last week's print.
• The groups rarely meet. Designers seldom stand at a wiring bench, and wiremen seldom see a site.
• Site learning has no road home. Any commissioning report goes to the client, not the shop.
• Roles describe tasks, not hand-offs. A description says prepare drawings or wire panels, never issue a frozen revision or hand over a marked-up set.

• Take the last five jobs and list every revision issued after wiring began.
• Ask the site crew what was missing on their last three trips.
• See whether test sheets and redlines actually travel with each board.
• Find out when a design engineer last spent an hour at a wiring bench.
• Read the latest site reports, if any exist, and note who in the factory received them.

1. 1

   Hold a short kick-off for each job

   Design, planning, the lead wireman and the site lead agree the drawing set, open queries and dispatch date. A quarter of an hour can save a week.

2. 2

   Freeze drawings and use change notes

   After kick-off, changes come only as a numbered note stating what moved and the extra hours. The note is pinned at the bench and the stale print is collected.

3. 3

   Send a pack with every unit

   Redlined drawing, test sheet, punch list and any site instructions. The site lead signs that it arrived.

4. 4

   Report back after every trip

   One page: what was found, where it began and what was fixed. Read aloud at the weekly meeting.

5. 5

   Cross the lines on purpose

   Designers spend an hour on the floor each month. Senior wiremen join a commissioning visit now and then.

6. 6

   Hold a joint review each month

   Change notes, site reports and rework side by side, sorted by stage and never by name.

7. 7

   Write hand-offs into roles

   Each description names what the role receives and what it passes on. Writing role hand-offs covers design, shop and site posts alike.

Job number, client, site address and the client's site contact.
Drawing set at the frozen revision letter: single line diagram, general arrangement, schematic and wire schedule.
Numbered change notes issued after kick-off, each with the hours it added.
Redlined print from the bench, showing every alteration made while wiring.
Signed routine test sheet, including any tagged item and how it was cleared.
Punch list of open points the site crew must close.
Shipping split list: which sections travel apart and which interconnection cables ride with them.
Loose items counted: door keys, spare fuses, gland kits and lifting eyes.
Received by the site lead: name and date.

The pack works only if someone checks it at the dock. Make the dispatch clerk tick each line before the truck is sealed, and let the site lead refuse a board that arrives without its redlines. Within a few jobs the bench starts marking prints as it goes, because nobody enjoys rebuilding them from memory on the last evening.

The page on cubicle builders covers revisions landing mid-wiring and engineers who live out of a bag. The page for board, busway and feeder pillar makers covers estimators and fitters who work apart. Its note on conduct at client sites helps brief anyone before they travel.