Technical Directive 00/65

Priority:  Normal
From:  Judy Barker, Programme Manager (Meat and Game) File:  M310-200
Date:  12 May 2000 (1) Publication Ref:  IS 6/IAS 6

Post Slaughter Management – Process Hygiene Index (PHI)

1 Background
1.1 Industry Standard 6, sections 3.5.2 and 4.2.2 and IAS 6 sections 3.2.2 and 4.2.2 set out an objective PHI criteria for the post slaughter cooling of meat and offals.
1.2 The objective criteria were derived from published scientific work. However, practical meat industry experience during the validation of chillers suggests that compliance with the mean value (7) could result in a significant increase in current refrigeration requirements. MIRINZ support this view and have been commissioned to review the PHI criteria and produce a technical report that would validate any recommendation to modify the current criteria.
1.3 Whilst compliance with a mean of 7 is possible, data to date suggests that many processes are not achieving this value. Most processes are able to comply with the 80th percentile and maximum values of 10 and 14 respectively.
1.4 The current PHI criteria are validated by the cited reference and can not be changed unless the scientific justification to do so is sound and transparent. However, without prejudice to the outcome of a MIRINZ technical report, in view of current practical experience and to the current urgency to validate chillers, failure to achieve a mean PHI of 7 should not constitute a non-conformance.
2 Aim
2.1 To advise an interim PHI compliance standard, to be used while the PHI criteria is under review.
3 Procedures
3.1 The following interim PHI compliance criteria may be substituted in IS 6, sections 3.5.2 and 4.2.2 and IAS 6 sections 3.2.2 and 4.2.2.
3.2 Post slaughter cooling process that, when validated, conform to the following PHI criteria may be regarded as complying processes:
  • 80th percentile 10
  • maximum 14
4 Implementation
4.1 Immediate

Key contacts