Programme Description
The MilkChek ILCP programme has been developed to suit the needs of our client laboratories, most of who are linked with milk processing facilities, raw milk testing facilities, and contract laboratories throughout New Zealand.

Schedule
Proficiency samples in the MilkChek Programme are despatched each month (refer Timetable). Participants are given eight days to analyse samples and return results.

Samples Description
A range of samples are provided covering raw milk and processed milk matrices. These cover:

• Component analysis (Raw Milk & Processed Milks)
• Microbiological analysis (Raw Milk & Processed Milks)
• Freezing point
• Phosphatase
• Inhibitory Substances
• Somatic Cell Count
• Foreign Matter

Test Methods
Both reference methods and rapid instrumentation results are collated and reported, assisting laboratories with in-process calibration checks as well as laboratory grading tests.

Performance Reporting & Evaluation
Statistical summaries and reports are e-mailed to participants two days after the due date for results.

The reports provide information about the data pool of participating laboratories, the individual laboratory result as compared to the Assigned (Median) Value, a histogram showing distribution of all data, and a run chart for tracking historical performance. The statistics used are a robust, well-proven approach.

A rating is given as an interpretation of performance, using set criteria based on a normalised difference value, and bias. A score of Good, OK or Alert is issued for every test.

Annually we prepare an industry summary report. This includes a review of the summarised data for each test for reproducibility, occurrence of outliers, appropriateness of performance limits, and any testing issues that may have arisen (methodology influence). We also prepare summarised individual laboratory reports.

Secondary Reference Samples
UHT reference samples for chemistry component testing (Fat, Protein, Lactose, Total Solids) are available for Laboratories to use as a benchmark for internal quality control and training.

Timetable - 2007/2008