Enumeration of Enterobacteriaceae, cfu per gram.
Statistical analysis is used to convert the participants results to a Z score which can then be used to identify questionable or outlier results by a robust statistical procedure (any results outside of +/-3 SDs of the mean is discounted). The consensus mean and standard deviation values are used to determine z-scores.
Authorised reports are published electronically. These show intended results, results from all participants and contain a link to the Histograms report.