Statistics are at the heart of Six Sigma’s powerful methodology for quality improvement. It pays to get to know some of the most important of the Six Sigma statistical tools.
The control chart is the fundamental tool of statistical process control; a proven technique for improving productivity. It monitors the variation of key characteristics and indicates the range of variability that is built into a system. Control charts provide diagnostic information about process capability that can be used to analyze variation in process data to demonstrate whether a process is operating consistently. The bounds of the control chart are marked by upper and lower control limits that are calculated by applying statistical formulas to data from the process.[ Members Only Content - please sign up to view it... ]