How many panels are sitting half built, waiting for something?

A panel needs several hundred items. Wiring starts when the kit looks complete.

Two contactors are missing. Nobody knows until the wireman reaches them, by which point the panel is half built and cannot be closed, so it occupies a bay and waits.

The kit is checked against the bill of materials as a stage, before the bay is occupied.

Every panel is tested. Faults are found and corrected, and the panel ships.

But nobody records which fault, on whose build, so the same wiring error recurs across panels and across months without anybody seeing it as a pattern rather than as an incident.

Each fault is recorded against the panel, the stage and the person who built it.

Panel drawings change during the job. That is normal — the customer clarifies something, a component becomes unavailable.

The change reaches the site engineer and the project manager. It does not always reach the man with the crimping tool, and he is the one building it.

The current drawing sits on the panel job, visible to the person at that stage, with the revision on screen.