Quality Management

The quality endeavors of an organization, like other enterprise activities, must be oriented towards the economic principles. This approach give way to many organization to question the extent to which the quality management contributes for the overall business success and to pin point the areas where particularly a high value can be created in order to attain the maximum possible economic benefits out of QM-Systems. Without including the answer of this question in the decision making process, the resources can not be allocated optimally for the quality purpose. The following illustration depicts how the quality-based activities generate the value to enhance the performance and a variety of indicators reflects how they indirectly add value to an organization and hence contribute to its economic success.

Metrology supplies valid information about the production. Utilized in control loops metrology often is the enabler to a capable production. Benefits in terms of a contribution to the production’s value added is generally unknown. This paper answers the question how the use of or investments in metrology can be rationally justified - not only on the basis of a cost minimization, but as an assessment of production performance due to measurements. A decision-theoretical model comparing the deployment of metrology with compared to an abdication of measurements enables the necessary quantification of the benefits. Embedding the decision model in quality control loop shows that the feedback of measurement information leads to a considerable process improvement.

Quality in the production ramp-up significantly affects the success of new product introductions. At the same time the number of restarts in producing companies grows with more divers and specific customer requirements and less vertical range of onsite manufacturing. The resulting complexity is difficult to manage and often leads to quality issues. This article tackles the problem by focusing on quality aspects of the ramp-up management. Based on a holistic understanding of quality the authors present „PAM“, a model for production ramp-up. PAM structures the highly complex topic of ramp-up management and at the same time represents all relevant interdependent elements. The model provides a basis to systematically improve quality in production ramp-up.

To compete in the global environment companies in high wage countries have to separate themselves from competitors from low wage countries by offering customer specific products and services. Due to the rising complexity of these products the steering of the corresponding production systems is getting more and more resource consuming. One way to handle this aspect is developed within the Excellence Cluster “Integrative production technology for High-wage countries” at RWTH Aachen University. Objective is the set up of production systems that are able to produce customer specific products at mass production costs.

The global players of the aviation industry are shifting a growing shares of their value added to their subcontracters. New subcontractors must do considerable expenses to get accustomed to the special quality and security requirements of the aviation industry. This can be done as an EASA approved production organisation or as an extended workbench. The decision orientates itself at the specific activities required.

The article describes the quality inspection of micro cold formed components in the collaborative research center 747 “micro cold forming” at the University of Bremen. These components, e.g. small springs in cell phones, are manufactured with a speed of up to 300 parts per minute in a micro cold forming machine. Overall dimensions are below 1mm. These dimensions lie in a field between tactile measuring techniques of form and position and surface metrology, e.g. roughness. Yet a high inspection rate is impossible due to problems in production engineering and metrology. Therefore, fast optical metrology, new evaluation methods and quality control is needed to ensure an economical manufacturing process for micro cold formed parts.

Due to increasing product complexity, quality, timing and resource constraints, the management of product development projects becomes more and more challenging. Especially the determination of current product quality, an indicator for the actual development status, is hard to accomplish. For this reason, the article presents a concept for a real-time quality estimation for products and intermediate results. The concept is used and evaluated in the semiconductor industry.

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 ...

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.