ISKRIT / Construction site / Survey reconciliation
Construction site
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 2026-09-26
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 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
Price
Free in full, no sign-up and no payment.
Open the calculator →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.