Abstract
The requirements of factory planning and the building concerned have changed in the last years. Factory planning has the task of designing products, plants, processes and the building of a factory. Although the building has an indirect influence on manufacturing systems, a quick conversion of the building is crucial in the event of changes in production technology. A current digital building model of the factory enables to carry out conversion processes quickly. The approach develops a method to update a digital building model of a factory during operation. Photogrammetry is used to update point clouds and derive BIM models.