It looks like that the 960 number is predicated upon a start time from "idle", and minimal interactions. The actual slope rate of test completion looks like it's 192/hour. If that throughput can be maintained with more frequent interaction to keep the machine fed, it'd be 4.6k/day. https://www.dialog.roche.com/content/dam/dialog/owp/apac/Med...

That is, it takes time to "stuff the pipeline".

The cited number -- 4128 -- appears to be 21.5 * 192.