Certifications

A certification is a one-time inspection that fixes what a truck’s container holds, or who a crew is. It is a record, not a ticket’s field event: it is made once, and every field event that scans its badge refers to it.

A container or a crew, never a vehicle

What is certified is the thing that holds the debris, because its volume becomes money (capacity × load call). The vehicle that moves it is incidental.

Configuration	The container certified	The vehicle
Tandem dump truck	The integral dump bed	The same chassis
Pickup pulling a trailer	The trailer	The pickup: motive power, uncertified
Truck with a built-in bed	The built-in bed	The same chassis
Self-loader with an integral box	The built-in box	The same chassis, with its loading arm

A certification is not per truck. Swapping which pickup tows a certified trailer changes nothing; a tandem’s truck body and trailer are two certifications.
A crew certification covers equipment whose work isn’t billed by volume: a bucket truck crew (hangers, leaners) or a skid steer crew, billed through unit rate tickets. A crew is its certification: there is no separate crew list, and a crew certification has no measurement.

Capacity: measured, never typed

A container’s capacity is computed from its measured boxes, exactly as the firm’s paper form does it:

All measurements in whole inches.

Primary box   L × W × H
Each further box, labelled by its feature (sideboards, tail gate extension, dog box, wheel wells…),
marked ADD or SUBTRACT:
  rectangle      L × W × H
  triangle       L × W × H ÷ 2
  hoist          (L1 + L2) ÷ 2 × W × H
  round bottom   [3.14 × (D ÷ 2)² × L] ÷ 2
  radius corner  (R × R − 3.14 × R × R ÷ 4) × run × corners, always subtracted

Total cubic inches = primary ± every box
Cubic yards        = total ÷ 46,656
Round to hundredths after each step; capacity = cubic yards to the nearest whole, .5 rounds up.

Worked example: certification 730415, Coastline’s dump trailer. Primary 360 × 96 × 72 = 2,488,320; sideboards 360 × 96 × 16 = 552,960, added; total 3,041,280.00 cu in ÷ 46,656 = 65.19 → 65 CY.

There is no manual override: a wrong capacity is fixed by fixing the measurements, and the boxes are kept so the capacity can always be recomputed and audited.
The rule lives once, in the shared domain package, so the certifying phone and the server give the same answer.

One number: cert, placard and badge

The cert number is the placard number is the badge number. One identifier, never two.

A monitor on a phone assigned to certify measures the container.
The number is the phone’s next from the project’s series (730419), or taken from pre-printed certification paper.
730419 is written on the placard, which goes on the container: readable from thirty feet at a dump gate.
The driver’s badge carries 730419; every monitor scans it at New.
Every field event that truck makes records 730419; reports and the ledger show it.

The number is unique within its project. Each field event keeps both the link to the certification and a copy of the number as scanned, and the worker compares a load’s two numbers exactly: a difference means two different containers, and is flagged.

Lifecycle

Certifying happens where there is signal, on a phone whose assignment includes certifying.
Five photographs: the operator with the placard, the interior or back, the right side, the left side, the front. A missing view is flagged, never blocked.
A certification never ends on its own. These flag later tickets, judged at work time, and the tickets still bill: an expired tag, a certification revoked from a date (by an admin, with a reason), or one replaced by a new certification. A driver’s licence flags nothing.
A measurement mistake is corrected in place, audited, and its tickets reprocess.
A modified truck (sideboards added) gets a new certification with a new number and a replaces link, shown on both: “replaces 730416 (sideboards added, 14 Oct)”.
The same truck on another project is certified there from scratch, with that project’s own number. A certification is never copied.
It is usable before QC. It starts at QC Review; a back-office user sets QC Approved, QC Issues or QC Void, recorded as checked by.
Never deleted: it is the evidence that a measurement was taken.

A truck keyed in by hand

Where there is no badge to scan, the monitor types the number and the capacity they read. The certification’s capacity bills, and a typed capacity that differs is flagged (“capacity typed 60, certified 65”). A number the phone’s lists don’t hold makes the phone warn and ask to refresh its lists; nothing is refused. A number with no certification on the project leaves the load unbilled and flagged until one exists.