Ketta Ash opens fan-hour totals, temperature notes and the neighborhood air board at the south vent trunk. Before anyone changes a mark, the crew checks the fan is reduced during maintenance while the public board remains unchanged. The cooling weeks period sets the pace of the work.

The page holds 54 fan hours recorded with a matching air sample. Ketta Ash reads the preceding count, 55, before the next line is entered. A number without a date would not tell the next crew what changed.

The plant totals are posted monthly. Nearby households want the maintenance hours listed on the same board. Here the difference is visible between the posted rule and the route, service or shift just beyond the door.

The committee records a decision and the reason on the public board. The board recorded the outcome that it adopted a revised schedule with a worker review period.

The shift closes with the source page attached to the board. The next file uses a new date and scope.