X Bar S Control Charts are a type of control chart often used to examine the process mean and standard deviation over time.
Walter Shewhart is often referred to as the “Father of Quality Control” – he worked as a process engineer for Western Electric and Bell Labs.
X Bar R charts are the widely used control charts for variable data. They help to examine the process stability in many industries.
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.