These figures are an illustrative example, invented to show the arithmetic. They are not data about anyone.
Suppose a row has 30 hours per week of real capacity. In one week its cell reads 120%. That is 30 × 1.2 = 36 hours of planned work in a 30-hour week: six hours that do not exist. The cell turns red and prints OVER. Nothing about the person’s skill or effort changes that; the week is simply too small.
Now suppose the demand row for that week says 100 hours and the team has booked 94. The Gap row prints −6 and the word short. Two separate failures, one cell and one column, found by the same reading. Fixing the first by moving six hours to a colleague with free hours may also fix the second, or may not. Move it, then read again.