Main Effect Malcolm Baldrige Quality Award Mann-Whitney-Wilcoxon Test Master Black Belt Matrix Diagram Mean Mean Square Mean Time Between Failures (MTTB) Measure Phase Measurement System Analysis (MSA) Median Metric Minimum Minimum Aberration Design Minimum Run Designs Mode Model Model Hierarchy Monte Carlo Analysis Monte Carlo Simulation Muda (Waste) Multicollinearity Multiple Comparisons Multiple Regression Multiplicity Multi-Vari Chart