How Many People You Actually Have CAPACITY
Two numbers exist and the wrong one gets quoted. Posts that exist, posts that are filled, and then the number who will be at work on a Tuesday, which is neither.
The two numbers everybody quotes
What comes off
Percentages are taken of strength, not of establishment: a vacancy does not take leave. Taking them of establishment is the commonest way this arithmetic is got wrong, and it flatters the answer.
The honest number
The working
Questions people ask about CAPACITY