Dear All,
Intriguing thread. I found Laura's scoring procedure very interesting as also Bonno's comment regarding the conceptual difficulty in accepting a numerical system for hazard analysis.
It should be emphasised that one of the primary intentions of the
HACCP concept is to force the producer to examine his system so as to prioritize any observed health (usually) related risks. It was also originally assumed that the
HACCP system would be highly evolutionary, ie regularly updated in the light of internal/external experience.
Initially
HACCP plans may require a significant amount of process analysis / observation / interpretation / evaluation / discussion. The amount will depend on the specific system and its potential for impacting on receiver health issues. The original
HACCP plans were loaded with sanitation
CCPs as per Caitlin's idea however it was later considered more effective to separate these out ('pre-requisites') since they would be expected to be addressed in a basic GMP system already. This approach is debatable (see for example the recent salmonella incident in another thread on Cadbury's chocolate) but convenient (for auditors especially) and popular. Whatever, the size of the resulting plan is going to be related to the specific process, eg raw compared to ready-to-eat products. In some cases (countries) a semi-prescriptive procedure with model presentations is available where 'experts' have studied a range of typical ways to make products, eg USA / Canada for seafood / foods, not to forget this web-site itself for packaging.
Regarding Laura's scoring system, never used FMEA however I am bit uncertain as to the inclusion of the 'detection' function (usual
HACCP procedures restrict to 2 parameters). One problem with the scoring system is how to weight the different risks. Laura's method seems initially unweighted which is convenient but IMO questionable. I liked the inclusiveness of the procedure but it looks to require a lot of deliberation / documentation?. The same problems occurs with non-scoring techniques where qualitative (judgemental) probability assessments are still required (importation of new food species has generated a lot of good business for health/environmental risk assessors). The Codex
HACCP tree presents a logical question chain while permitting any, presumably validatable, risk assessment system to be used, qualitative or quantitative.
Auditors in my experience are reluctant to deviate from expected patterns which they have met before which can make it difficult to include items which are, at least IMO, debatable. The most frequent
CCP arguments I have had with auditors are (a) including raw material control in the
HACCP plan proper (not as a pre-requisite), (b) not including metal detectors where I considered there was no significant risk of
metal contamination, © including traceability date-coding aspects.
Rgds / Charles.C