Build it, bill it, maintain it.

Retention is cash sitting with your client; certified-not-invoiced is work you have earned and not yet asked for. Both are usually discovered at month end from a spreadsheet. Here they are a live figure per project, ordered by how far variations have moved the contract.

Rules are thresholds: below a figure one signature, above it three. The check runs on the server rather than on whether a button was drawn, so it holds whether the request came from the screen, a script or the API. An approver going on leave hands over their own authority and nobody else's.

Approved variations append to the bill as new lines rather than editing the original, so the contract value moves and the audit trail survives. Certified quantities write back from each payment certificate, which is what makes cost value reconciliation possible without a second spreadsheet.

Each figure is a door: the dashboard leads straight into the records behind it, filtered by your company and your role. There are separate views for an owner, construction operations, facilities and commercial, because those four people are not asking the same question.

The tag holds a secret token rather than a database id, so a sticker cannot be guessed at or moved onto another asset, and it can be rotated if a batch of labels goes astray. Scans are recorded — who, when, from which tag — which turns a sticker into evidence that somebody actually attended.