The worked example.

Output 01 · structure inventory

Every quantity has a source: the as-built drawing, or a measurement taken on site.

The inventory pass walks the structure from the road level over the culvert to the inlet and then the outlet. Dimensions are read from the as-built set and checked by tape and laser on site; where the two differ, the site figure governs and both are recorded. What could not be reached is written down before anything is rated: the inlet apron lay under sand and three metres of cell 2 stood under approximately 0.4 m of standing water.

Quantities are estimated from the as-built drawings and confirmed or corrected by site measurement, and the report says which. A quantity with neither source is not printed.

Output 02 · defect log and sketch

Every defect is located on the sketch, measured on site, and tied to the plate that shows it.

Length and width are taken on site by tape; crack width by gauge. Quantity is length × width where both apply, and the unit follows: metres for a line, square metres for an area, cubic metres where a depth was measured (D-07). D-02 was proposed from the plate at 0.41 m² and corrected by the engineer to the taped 0.38 m²; the proposal is kept beside the correction, not overwritten.

Output 03 · element condition table and structure condition index

The calculation is printed in full, so the index can be checked from the table that produced it.

Barrel · CS3 poor 1.2 m · CS4 severe 0.0 m, drawn at zero width rather than omitted · after the gap, hatched: not assessed 3.0 m

Barrel, reconciled to the logD-01 runs 5.40 m. The 1.20 m length containing D-02 and D-03 is taken at CS3, so D-01 contributes 4.20 m to CS2 and no length is counted twice; D-04 adds 1.80 m at CS2. Assessed 33.0 m: CS1 25.8, CS2 6.0, CS3 1.2. The states sum to the assessed quantity, never to the element total.

WCS

Weighted condition state, Σ(state × share): the share-weighted mean state of the element.

ESCI

Element condition index, 100 × (4 − WCS) / 3 on a four-state scale — 100 % when everything is CS1.

Si

Significance factor of the element in the structure, from the method’s culvert element set; the barrel carries 4.0 of the 10.0.

Denominator

Each element’s shares are of its assessed quantity. The inlet apron and 3.0 m of cell 2 are excluded, not assumed sound.

Output 04 · structure rating and component rating

Two ratings from one evidence base — and the rule that produced each, quoted.

Rule CS-3(b), method M-2026.1, quoted“Exposed reinforcement without recorded section loss does not of itself reduce item 62 below 6. Where section loss is recorded, or where CS3 exceeds ten per cent of the assessed quantity, it does.”

Two ratings can legitimately say different things about one structure: the index measures extent-weighted condition; the component rating is governed by the worst significant defect. The report prints both with their bases, so nobody has to choose which one to believe without knowing why they differ.

Output 05 · priced bill of quantities

Logged quantities become paid quantities through a versioned take-off rule, in view, and carry their priority.

Rates

Schedule RS-2026-Q1, dated 05.01.2026, in the owner’s currency — a specimen schedule, fictional. Excludes access, traffic management and provisional items.

D-04

No item. Efflorescence at CS2 is recorded and monitored; the catalogue holds no repair for it at this state.

11.04

No quantity, because none has been established. Three metres of cell 2 were not assessed.

Preliminary. Quantities derive from the defect log through the take-off rule named in each row, not through judgement applied at the time of pricing. This is an order of cost for capital planning and prioritisation; it is not a tender price, it is not a design, and it is superseded by the engineer’s signed version at sheet 09.

Output 06 · depreciated replacement cost

The value is the index applied to a stated replacement cost — and the route that cannot be computed says so.

Rates

Replacement rates from schedule RS-2026-Q1, the same dated schedule as the bill; quantities from Table 2.1. In the owner’s currency; fictional.

RUL

The year built is unknown (Table 2.1), so the remaining-life route has no input. It is printed as not computable, not estimated — an age assumed here would become a value on a balance sheet.

Basis

The accounting basis is the owner’s where one exists; the method states the one it used. A valuation is signed as a valuation under that basis, never as a fact about the structure.

Output 07 · recommendations, preservation options and the deferral case

What to do, by when, what each option assumes — and what deferral costs in present value.

ISNAD presents the options and the assumption behind each. The engineer chooses, and the choice is recorded against the version they sign. No option is marked recommended, and the option to do nothing is set in the same weight as the others.

Output 08 · evidence-linked report and inspection certificate

Every rendered line resolves to a measurement, a plate and a decision — and the certificate carries the same figures.

— 14 —

A clause that cannot resolve to a measurement and a plate is not rendered. The certificate prints nothing the report does not carry, and what could not be done is on it at the same standard as what was.

Output 09 · signed method version

Two signatures. Two liabilities.

A report cites the method version it was produced under. That is the whole of the attribution: a figure, the measurement it rests on, the rule that produced it, and the two people accountable for each.