As-Built Surveying as an Evidence Chain

Source information

• —The accepted survey control network and its condition.
• —The coordinate and vertical datum and the control points used.
• —The current drawing revision and permissible tolerances.
• —The limits of the area, structural element or system.

Field and office workflow

• —The survey task and unambiguous identification of the measured asset.
• —The field data file, date, instrument and surveyor.
• —A completeness check and calculation of actual deviations.
• —Issue of the drawing with an unambiguous link to the work and register.

Checks before submission

1. Compare the drawing with the current design.
2. Check symbols, scale, coordinates and levels.
3. Link the drawing to the acceptance record, log and measured work quantity.
4. Register comments and evidence of their resolution.
5. Include the accepted revision in the final completion dossier.

How the packages are divided

The specialist surveying package organises the survey team's work across the project. The discipline-specific surveying module integrates measurements and drawings into the evidence chain for a particular type of construction work.