Well then, You'd better ask someone cleverer than me!
(The first answer to this question had the correct answer and I'm messing it about.....)
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The concepts of Six Sigma mean reduce variation. In order to achieve profound results, this methodologies uses by various companies. There are varieties in Six sigma from which Lean Six Sigma are commonly used. Now the demand on six sigma is increasing
Six Sigma is a manufacturing process control strategy which first implemented by Motorola. Six sigma being common used by any sectors of industry nowadays, especially those precision product manufacturing. Six Sigma manufacturing implemented to control the process or stabilize the process. Then, seeks to improve the quality of process outputs. Six sigma manufacturing tools are used to stablize or improve processes, aiming towards reaching the target.
Motorola created the Six Sigma tools and procedures in 1986 with the goal of enhancing the quality of process outputs by reducing variability and locating and eliminating errors' root causes (Tennant, 2001).
Delta-sigma adc
Since the white belt is an introductory session to six sigma, it is not worth very much, but is a start on the trail to be a green or higher belt.