6 Sigma
Six Sigma (6σ) is a set of techniques and tools for process improvement. It was introduced by American engineer Bill Smith while working at Motorola in 1986. A six sigma process is one in which 99.99966% of all opportunities to produce some feature of a part are statistically expected to be free of defects. Methodologies of Six Sigma There are two major methodologies used within Six Sigma, both of which are composed of five sections, according to the 2005 book “JURAN Institute Six Sigma Breakthrough and Beyond” by Joseph A. De Feo and William Barnard. DMAIC : The DMAIC method is used primarily for improving existing business processes. The letters stand for: D efine the problem and the project goals M easure in detail the various aspects of the current process A nalyze data to, among other things, find the root defects in a process I mprove the process C ontrol how the process is done in the future DMADV : The DMADV method is typically used to create new processes and new prod