5. cl Distribution of valid cohort badge readings Numbersof valid cohort badges (sample size) by likely activities, exposures Clustered (or bimodal) Large All or nearly all Percentage of crew represented by valid cohort badges Moderate spread Modest 1/2 to 2/3 Widely spread Very few Less than 1/2 Very large (e.g., 8, 10, 10, 18, 31) Somevariation Fairly uniform Variations of numbers in each cohort ality (e.g., alphabetical) have had common- toward commonality No apparent effort cohort unlikely to Lo Some members of Implies high degree of QUALITY Medium COHORT commonality of duties, activities, location General composition of enlisted rating groups in each cohort CRITERIA Table 6.1. Evaluation of cohort badging of a given unit for a given badging period.