Verification during construction is not new. The positions of building components have always been checked by traditional surveying methods, whether that is using a total station or a tape measure. Today we see an increasing frequency for as-built point cloud scans as part of the delivery of a project is a sign that clients are no longer willing to rely on design models unchecked and issued as record information.
The core of the verification process involves comparing the registered laser scans against a model; the result provides visual and statistical feedback on the comparison. There are currently two types of verification process. These can be characterized as geometry-only or contextual verification. Verification should not wait until the end of a project, the reason for this is to ensure the site install matches the model otherwise teams are coordinating in a space that may not match the site install for whatever reason and this would clearly have a knock on effect to the rest of the coordination zones in a model. We use a number of softwares including: