X Bar R charts are the widely used control charts for variable data. They help to examine the process stability in many industries.
An XmR chart (aka Shewhart’s Control Chart aka ImR chart) is a chart where the control limits are calculated from the moving average range.
Linear regression is a statistical technique to estimate the relationship between a dependent variable and an independent variable.
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.