• critical values;
  • lower confidence bounds;
  • multiple characteristics;
  • one-sided specification;
  • process capability index

The generalized yield index inline image establishes the relationship between the manufacturing specifications and the actual process performance, which provides a lower bound on process yield for two-sided processes with multiple characteristics. The results attended are very practical for industrial application. In this article, we extended the results in cases with one-sided specification and multiple characteristics. The generalized index inline image was considered, and the asymptotic distribution of the natural estimator inline image was developed. Then, we derived the lower confidence bounds as well as the critical values of index inline image. We not only provided some tables but also presented an application example. Copyright © 2012 John Wiley & Sons, Ltd.