3D laser scanning can also be used to validate design execution for quality assurance purposes. By doing a quick 3D laser scan of a completed or in-progress project, contractors can create a model of existing conditions which they can compare to the as-designed drawings or model for quality assurance.

Most constructions (windows, doors, stairs, etc.) are delivered to the construction site already manufactured. When assembling them, it becomes evident that there may be imperfections in the details. By conducting laser scanning before finishing works, you can assess even the smallest discrepancies and rectify them.