Division 1.1 Number of recognised organisation-related detentions in relation to total inspections over a three-year period
United Kingdom
being
Ul = N · p + 0,5 + z · [N · p · (1 – p)]1/2
Uh = N · p – 0,5 – z · [N · p · (1 – p)]1/2
where
n Ul Uh N p z
number of recognised organisation-related detentions
threshold low to medium performance
threshold medium to high performance
total number of inspections (minimum number = 60)
fixed yardstick = 0,02
statistical significance factor = 1,645