The laboratory for machine tools WZL of RWTH Aachen University and Scheidt & Bachmann have jointly developed a methodology for product structure oriented continuous improvement of products and processes. The staff members’ manifold experience with complex products is used effectively by a combination of a product structure oriented assessment and a production portfolio oriented interpretation. Hence, experiences are quantified by the metric “additional effort of time per single use”. This additional effort addresses the coordination and correction expenses, which are typically not quantified and handled by variety-neutral surcharges in the calculation scheme. The methodology is working on the basis of “As-Is” data and not as usual on the basis of planning data like in conventional approaches of variant management. The factual composition of the products is used instead. By applying the methodology for several product families, latent optimization potential could be determined ...