Analysis of Variance (ANOVA) is a parametric statistical technique that compares data sets. They evaluate the means of three or more factors.
The Theory of Constraints states organizations can be measured by three criteria: throughput, operational expense, and inventory.
Cellular Systems is kind of Lean approach that seeks to achieve efficiencies by leveraging the similarities between production units.
Value Stream Mapping is a material & information flow map. It’s also a tool for visualizing processes that need improvement.
A Cause and Effect Diagram (aka Ishikawa, Fishbone) showing possible causes (process inputs) for a given effect (process outputs).