The Six Sigma programme has recently gained popularity throughout the world. There are a number of claims of its successes as well as failures. Successful claims are mostly supported in the literature with the popular case studies of Motorola, GE, and some other American companies. Based on the popularity of these success stories, many companies started implementation of this programme. Some di...

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In today’s fast-paced global economy, time to market constraints are demanding that companies produce their products more quickly and with higher quality. This has driven a shift from inspection based quality where defects are found and repaired, to design based quality where defects are prevented from ever occurring. Through QFD, design of experiments, detailed failure mode analyses, and other...

Since the 1980s, several important quality management systems, or programs, such as ISO 9000, TQM, Six-Sigma program, Reengineering, and Toyota production system (or lean production), have been launched. Most of these quality imperatives have been widely adopted by industries around the world. All the firms expect good results from the implementation of these quality programs. But the prerequis...

Six Sigma (SS) methodology is nowadays one of the most used approaches in the Quality Management field since its benefits coming from the improvement of the process outputs quality by identifying and removing the causes of defects and variability in manufacturing and business processes. Thus, literature on the SS topic is exponentially increased during last decades; the vast number of works on ...