Reduction in Repair rate of Welding Processes by Using DMAIC

Abstract

Six Sigma is being Implemented all over the world as a successful quality improvement methodology. Many companies are now days are using Six Sigma as an approach towards zero defects. This article provides a practical case study regarding the implementation of Six Sigma project in a welding facility and discusses the statistical analysis performed for bringing the welding processes in the desired sigma Limits. DMAIC was chosen as potential Six Sigma methodology with the help of findings of this methodology, First identified the critical factors affecting the process yield and then certain improvement measures were taken to improve the capability of individual welding processes and also of overall welding facility. This is an exploratory research. The research methodology incorporated qualitative & quantitative research instruments. A comparison is done between various process excellence initiatives. An integrated methodology using the tools, techniques and skills from lean principles and Six Sigma is necessary to optimize business process.