Productivity is calculated by dividing the output in a department (i.e. revenue, rooms occupied, covers) with the number of hours paid for. We differentiate between total productivity, that takes the output divided by the total hours, and operational productivity, that takes the output divided by productive hours only.
Example in housekeeping: If 100 rooms are cleaned in 50 hours, the productivity is 2. [100(output)/50(hours) = 2(productivity)]