ISKRIT / Construction site / Survey reconciliation
Construction site
Reconciling claimed quantities against as-built survey data
The tool compares the quantities claimed by the contractor 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.
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
Free and full version
Free
- Code-based calculations with no run limits
- Input validation and printable results
- Works instantly, no sign-up required
Full version
- Save projects and reconciliation schedules
- Import large schedules from Excel
- Shared access to schedules for the control team
- Reconciliation history per project
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.