Tong, Lee‐Ing; Chen, Jann‐Pygn - In: International Journal of Quality & Reliability Management 15 (1998) 8/9, pp. 907-919
When the process probability distribution is non‐normal or is unknown, the process mean and standard deviation may not properly describe the distribution’s shape. Consequently, the traditional process capability indices (PCI) C p , C pk , C pm and C pmk cannot express the actual process...