CHAPTER 12
Basics of Six Sigma Technique
The greater danger for most of us is not that our aim is too high and we miss it, but that is too low and we reach it
– Michelangelo
SYNOPSIS
In this chapter, system control on defects is explained. When system approach ceases to be effective, process approach takes over to reduce defects. This aspect is clearly explained. A process does reach ‘zero’ defect level when its variability is far less than what is permissible by specification. This key point is explained and illustrated. A new process parameter z, the Sigma of the process, is developed along with another entity, first time yield (FTY). The essence of Six Sigma technique are z and FTY. A large number of examples have been worked out to make ...
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