Dear Rosie,
Sorry but I don’t remember if this is for BRC or what ?
Regardless, although it’s very risky to generalise about an unknown set-up, you will probably hv realised that most of the packaging people here claim to only require zero or perhaps 1 CCP in their HACCP plans. Nonetheless, it’s still yr Plan.
Strictly, a proper hazard / risk analysis requires an in-depth study of the process. If you want a food example, try some of the NZFA examples on their website where they use FSOs. I think most people initially do something approximating this (bar the FSO) and then start looking for ways to simplify the presentation (the subjective element).
The matrix philosophy is highly subjective (perhaps totally in the central area). And so is the Codex tree since this implicitly relies on an analogous risk assessment basis. The 3x3 is ultra-minimalist but if it works as per the Simon test, clearly minimises labour. Unfortunately, on some occasions, it prevents making fine differences where you want to do so in order to differentiate between options (although most auditors will probably never notice these distinctions). Ultimately, IMO, people often choose matrix size for strictly pragmatic reasons – it enables a decision which agrees with validatable sources and (hopefully) one’s own opinion plus the auditor has no significant quibbles (which is rare anyway). The majority of clear-cut CCPs are probably well stated somewhere, and similarly the pre-requisites. So the remainder are probably somewhere in the middle and need a proper examination of the realistic situation but the subjective aspect is still omni-present within the guiding principle of minimising total number of CCPs.
Never used the tree because I didn’t like all the ambiguous (to me) questions but it has the advantage that the final format for CCPs seems well recognised and the rest just fall by the wayside. I got a bit worried when I heard a guy coming out of a (food) HACCP lecture saying “I didn’t realise it was so easy, you just have to get XXXX and it’s a CCP”. But in reality, the matrix approach is not that different in many cases.
Maybe it doesn't work at all for packaging due to the food oriented question structure (not a packing person myself). I seem to remember seeing this comment previously.
If you need specific risk opinions, will probably hv to give more detail.
Rgds / Charles.C