Jeffrey D. Hofer is a senior statistician in Global Statistical Sciences at Eli Lilly and Company.
A Risk-Management Approach to Cleaning-Assay Validation
The authors recommend a strategy for classifying similar nonstainless-steel surfaces into three groups based upon the analytical recovery that was observed in this study.
Routine Sample Size for a Retest Procedure
This article discusses a straightforward approach that scientists may use to descide how many nonsuspect restest results are required to provide sufficient evidence to overcome an initial suspect result.