Besides the product quality companies have now recognized the process quality as further potential for more economic efficiency within the production. Process-oriented measured values are required for CIP activities as well as for Six Sigma projects when it comes to the determination of improvement possibilities. A manufacturing execution system (MES) offers the information virtually at the push of a button. By means of this CIP activities and Six Sigma projects are accelerated and in addition more potential is discovered than without a systematic entry of the process influences by a MES.