Process yield, the percentage of processed product units passing inspection, is a standard numerical measure of process performance in manufacturing industry. Based on the expression of process yield, Boyles (1994) presented a yield-measure index, S<SUB align="right"><SMALL>pk</SMALL></SUB>, for normally distributed processes. In...</small></sub>

Process capability indices have been widely investigated as a means of summarising process performance relative to a set of specification limits. However, most research works in the literature were restricted to handle processes with symmetric tolerances. Recently, a generalised capability index...