The East Seam review has exposed a basic problem with the city’s current practice: a reading can be counted without showing where it was taken, and a production schedule can then treat that count as clearance. The omitted direction column was not evidence of a hidden failure. It was evidence that the public digest was too thin to support the decision it was asked to carry.
The right response is not to keep every crew outside whenever an instrument changes. It is to say in advance what amount of change requires a second reader, where that reader must stand and what result would permit a limited inspection. A rule that is made after a shift has been held will always look like a judgment about that shift rather than a standard applied to all of them.
That standard should belong to the survey office and the workers who have to enter the face, not to the office that must meet an order. A foreman should be able to keep a crew back without losing the next inspection window, and the record should show the readings that led to that choice.
The cost is visible: a held face can delay stone, tools and wages. So is the cost of calling an incomplete measurement complete. The chamber should adopt a public tolerance and an independent sign-off, then review both after a season of use. Until those conditions exist, the honest answer to an uncertain mark is to measure again.
