The Central Limit Theorem states that the distribution of the sample means approaches normal regardless of the shape of the parent population.
A Pareto Diagram is a bar chart that re-orders the categories so they are rank-ordered from the largest total occurrences to the smallest.
Kaoru Ishikawa noticed that a lack of internal coordination affects a customer’s needs. Improved cooperation -> better quality & efficiency.
Variation can introduce waste and errors into a process. Six Sigma DMAIC is an excellent framework for reducing variation and waste.
The process mapping is a tool that graphically shows the inputs, actions & outputs of a process in a clear, step-by-step map of the process.