Reconciling claimed quantities against as-built survey data

Quantities claimed by the contractor are compared against the quantities derived from as-built survey: it computes the deviation in units of measure and in percent, checks it against a set tolerance, and flags overstatements, understatements, and lines with no survey data at all.

Data current as of 2026-08-24

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Standards

The as-built survey quantity is taken as the reference (GOST R 51872, SP 126.13330). The deviation tolerance is set as a percentage of the surveyed quantity.

Input

Tolerance in percent, plus lines: description, unit, claimed quantity, quantity from the as-built survey.

Output

Deviation, deviation percentage, within-tolerance flag, status per line, a summary of findings, and XLSX export.

What it does

Deviation of the claimed quantity from survey, in units and percent
A single tolerance in percent applied to every line
Overstatement and understatement beyond tolerance flagged separately
Lines with no survey data highlighted
Excel upload and XLSX export

The tool and the platform

The tool

Fully open

Deviation from the design, percentage, tolerance check and a status per line
Load the survey and volumes from Excel with no line cap, export the check to XLSX
Calculations are stored on the server and reopen next time, company letterhead with signatures
Works instantly, no sign-up required

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ISKRIT·Survey demo

By agreement

The work of a whole department: roles, history and modules linked together.

The check runs against the site survey log
Register of as-built drawings and the history of checks by period
Discrepancies become items on the construction control board

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Questions

What is the deviation percentage measured against?

Against the surveyed quantity as the reference. If there is no survey data but a quantity is claimed, the percentage is undefined and the line is flagged separately.

Which tolerance should be used?

The one adopted on site for that type of work. The tolerance applies to the absolute deviation, so it covers both overstatement and understatement.

How does this differ from reconciling against the design?

Here the reference is the actual as-built survey rather than the design schedule. Reconciling against the design is a separate tool.

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In the reference

Checking claimed quantities: the design schedule and the survey

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