Search Results

Six Sigma was developed by Motorola in the 1980s as an enhancement of their Total Quality Management (TQM) approach focusing on quality improvement. Companies such as General Electric (GE) developed the concept even further and extended the application of Six Sigma tools to their entire business, including the development of new products, with a focus on both financial gain and customer satisfaction. Six Sigma, however, also offers a rigorous, data-driven procedure for process and product improvement and for the development of new products and processes using proven methods and tools taken from the Quality Management and Quality Engineering toolbox. Integration into the existing engineering culture and the application of these tools and concepts to a typical application at a leading global exhaust system supplier are outlined in this paper. The procedure which is used for measuring the surface radiated noise is analyzed in detail by the principles of Six Sigma.

Up to now Six Sigma has mainly been used for manufacturing. A Six Sigma approach was introduced in 2004 at Tenneco for transactional business This paper illustrates 2 examples where Six Sigma was successfully applied to improve the service quality. One first case is the improvement of a measurement system analysis [1]. In the exhaust system domain the acoustic performance of an exhaust system must meet the requirements in terms of drive-by noise of a vehicle and in terms of subjective sound. Therefore it is vital to measure the so-called “tailpipe noise” of an exhaust system with precision and reliability. Otherwise some iterations take place to confirm the data, or - more critical - an exhaust system design can be rejected when in reality it is just meeting the target curves and inversely, this could be accepted when the targets are not met.

To improve the effectiveness within a development, it is essential to eliminate waste. Several tools focus on this goal: Lean Engineering, Lean Manufacturing, Design For Six Sigma (DFSS) and the Best Methods approach. However, none of these tools are focused on the sharing of knowledge. Modification on a development or production process influences all stages of a project. By a coupling of all processes, all influence factors are covered leading to the strategy of a Product Lifecycle Management (PLM). All data which belong to development, logistics and sales are saved and administrated in a global information center. The existence of such a center and the evolution of design tools give us the opportunity of sharing process knowledge between all participants of a project. This data sharing process allows us to manage and optimize processes using objective criteria in order to find the best solution. In a dynamic world changes occur at all levels of a product development cycle.