When are as-built drawings typically created?

As-built drawings are created after the completion of construction and the start-up of a project. They serve as a record of the actual construction, reflecting any changes made during the building process. These drawings include details such as the final locations of systems and equipment, materials used, and deviations from the original design, which are critical for future reference, maintenance, or modifications. They provide contractors, engineers, and maintenance personnel with an accurate representation of the project's final condition. This ensures that all involved parties have a comprehensive understanding of the as-installed configuration, which is essential for ongoing operations and future upgrades.