During all phases in the product life cycle quality is a key influencing factor. The earlier a high quality level reached during the product lifecycle, the lower the amount of quality deviations, required changes, and the occurrence of non-conformance costs throughout mass production. Already in the prototype phase, an efficient and effective quality control loop is an important enabler for achieving a high level of product quality. This includes a quality process and specified interfaces to product development, production planning and overall quality management. Presenting an approach for the development of such a quality control loop including interfaces to associated processes in product development, production planning and quality management as well as a first examination of affected process parts in production planning is subject of this paper.