Regarding monitoring differential pressure between rooms in production areas in pharmaceutical industry:
Is it required to set 3 levels of limits , i.e. Alert limit then Action limit then Acceptance limit
or it is required to set only 2 levels of limits, i.e.
1- Alert limit
2- Action limit (which is equivalent to Acceptance limit)
(My little understanding of “WHO Technical Report Series, No. 961, Annex 5 (pages 256 & 241)” and "WHO Working document QAS/15.639/Rev.1 May 2016 (pages 67 & 54) " is that only 2 levels of limits are required (Alert and Action limits only) not 3 levels of limits)
Thanks a lot
The following pictures are Snapshots from "WHO Working document QAS/15.639/Rev.1 May 2016 (pages 67 & 54) "