Statistical inference on the multiple-stream yield index

Abstract

Process capability indices have been used in manufacturing industries to provide a quantitative measure of process performance. In this paper, we proposed a multiple-stream yield index , and developed a procedure to provide practitioners an efficient tool for interval estimation and hypothesis testing on the yield index . Numerical examples are presented to illustrate how we may apply the procedure to actual data collected in the factory. The procedure is easy to use, and should be expected for in-plant applications.

Keywords and phrases:

• Interval estimate
• multiple stream process
• process yield index