Abstract
Data on tests of film badge services have been analyzed statistically to determine the probability that services may be expected to meet performance criteria developed under the auspices of the National Sanitation Foundation (NSF). These criteria were derived empirically on the basis of a single sample of film badge services in the United States. Ten film badge services participating in the NSF seal of approval program released their data for this analysis. The study compares the empirical criteria and statistical expectations based on newly available data. The implications of the analysis for future film badge performance criteria are also discussed.