Saghaei, Abbas; Najafi, Hoorieh; Noorossana, Rassoul - In: International Journal of Production Economics 140 (2012) 1, pp. 368-373
The quality level measurement of a given process is essential to some phases of six sigma methodology. So far, different indicators have been applied to estimate the capabilities of a process such as classic yield, defect per unit, sigma quality level and rolled throughput yield.