Six Sigma

A set of problem solving tools and methods used to improve performance and decrease process variation. The goal of Six Sigma is to increase profits by eliminating variability, defects, and waste that undermine customer loyalty.

Six Sigma can be understood/perceived at three levels:

Metric: 3.4 Defects Per Million Opportunities (DPMO). DPMO allows you to take complexity of product/process into account. Rule of thumb is to consider at least three opportunities for a physical part/component – one for form, one for fit and one for function, in absence of better considerations. Also you want to be Six Sigma in the Critical to Quality characteristics and not the whole unit/characteristics.

Methodology: DMAIC/DFSS structured problem solving roadmap and tools.

Philosophy: Reduce variation in your business and take customer-focused, data driven decisions.