How to Read the Result
The figure is the headcount the work needs with nobody idle and nobody drowning. A fraction means you are between two headcounts: round up if tickets are growing or your service levels are slipping, down if neither is true.
When Not to Use It
Do not use it to staff a single shift or a single day: tickets arrive in waves, and this averages a whole month. And do not use it for project or field work, which is booked rather than queued.