When a process has proven itself to function at a Six Sigma level this means there are less than ________ defects per million opportunities.

Six Sigma refers to a process whose output has at least 95% of its data points within 6Standard Deviations from the Mean.

The ROI for a project is a measurement metric that stands for Return on Investment and is one of the methods used to measure the success of a Lean Six Sigma project.

The DMAIC approach to problem solving stands for Define, __________, Analyze, Improve and Control.

Training cost is $3,000 and a project required an initial investment of $12,000. If the project yields monthly savings of $1,800 beginning after 3 months, what is the payback period in months (before money costs and taxes)?