Hsu, Ya-Chen; Pearn, W.L.; Wu, Pei-Ching - In: European Journal of Operational Research 191 (2008) 2, pp. 517-529
In the 1980s, Motorola, Inc. introduced its Six Sigma quality program to the world. Some quality practitioners questioned why the Six Sigma advocates claim it is necessary to add a 1.5[sigma] shift to the process mean when estimating process capability. Bothe [Bothe, D.R., 2002. Statistical...
