Six Sigma Programs:

Utilize advanced statistical methods to improve quality by reducing defects and variability in business process performance

Suggests that all activities can be controlled, employee empowerment is the best control tool, and $100\%$ control is possible

Consist of a disciplined statistics$-$based system aimed at producing not more than $2\mathrm{.}5$ defects per million produced for an assembly process

Radically redesign and streamline how an activity is performed

Are based on three principles: $1)$ all work is a statistically controllable process, $2)$ no well$-$controlled process allows variability, and $3)$ defect$-$free work requires tight controls