Documentation of the new facility is an important part of commissioning. The manufacturer and construction personnel will be passing system control over to the infrastructure management organization, and they may not be familiar with the intricacies of the new facility.
Three-dimensional computer-aided design or facility information models are usually prepared prior to new facility construction. However, there are often modifications to the original design during the course of construction. As a result, as-built three-dimensional models are often required for commissioning and are useful subsequently for infrastructure management. As-built models may require field measurements and specialized companies or groups to prepare.
Equipment documentation for operation, maintenance, and parts are also assembled as part of the commissioning process. While this documentation was on paper in the past, more and more documentation is available digitally. This has the advantage of providing immediate access to documentation in the field.