Alternative factors for control chart construction
Date of Original Version
Conflicting decision signals resulting from Shewhart Mean and Variability Control Charts produce undesirable consequences. Therefore, we construct "six-sigma" control charts by alternative methods to avoid problems associated with Control Charts yielding different signals. By adjusting methods for control chart construction for dispersion charts, we produce new reference tables. The new tables provide consistent signals and appear similar and familiar to users of historical tables.
Communications in Statistics: Simulation and Computation
Jarrett, Jeffrey E., and Xia Pan. "Alternative factors for control chart construction." Communications in Statistics: Simulation and Computation 37, 10 (2008): 2096-2105. doi:10.1080/03610910802339982.