I've never had an issue with start and end of batch for filters/sieves as a CCP under BRC. A batch would be anywhere between one and twelve hours of production for us.
The comment in the BRC interpretation guide is: Wherever possible monitoring must be sufficiently frequent to ensure that any necessary remedial action can be taken in adequate time so that there is no risk to the product and that no potentially affected product is released for sale or dispatched to the customer. (My emphasis underlined).
Dependent on your line design, you might have an entirely reasonable justification that start/end is the only feasible approach. If I take my final sieve out, liquid pours out all over the floor - it's designed to not be possible to run the line without it in place, as that way it can't be skipped...
As long as you're doing the post-production check before releasing the stock out of production then you should easily satisfy the latter part of the IG requirement. For the former bit, you'd just have to document and accept that you might need to scrap the batch if the filter fails, although depending on the specifics you might also have a reasonable argument that you could reprocess the stock.
Edited by pHruit, 28 June 2021 - 01:42 PM.