I said that you should standardize the filling machine by counting the tablets from a few bottles. After the machine is standardized you should not count all the tablets from all the bottles. This is known as PQ- Performance Qualification of counting machine.
Only for checking purpose your QC person should select 1 or 2 bottles (or according to filling stations on the machine) every 30 minutes or 1 hour and count manually as an In-process check.