Definition
As-built documentation records how an asset was actually installed, wired, or configured on site (capturing field changes, substitutions, and adjustments made during construction or commissioning) which can differ meaningfully from the original design drawings. It reflects reality on the ground, distinct from an OEM manual's generic, product-level documentation.
Key facts
- Reflects the actual, on-site installed and configured state, not the original design intent alone.
- Captures field changes made during installation or commissioning that original design documents would not show.
- Essential for accurate troubleshooting and modification planning, working from outdated design drawings instead can lead to incorrect assumptions.
- Should be updated whenever a subsequent modification changes the installed configuration, or it becomes outdated itself.
What information does As-built documentation preserve?
As-built documentation records the actual, final installed and configured state of an asset (which wiring path was actually used, which substitute part was installed, what field adjustment was made) capturing deviations from the original design that occurred during construction or commissioning.
How do maintenance teams use As-built documentation?
An OEM manual describes the product generically as the manufacturer designed and documented it. As-built documentation is specific to this particular installation, recording the actual site-specific configuration and any deviations from the generic design, both should be consulted together for a full and accurate technical picture.
FAQ
Frequently asked questions
Which documentation describes the actually executed asset condition?
As-built documentation describes it: the record of how an asset was actually installed and configured on site, including field changes, which can differ from the original design documentation.
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