to examine all relevant documents for each key comparison, starting with the protocol and ending with the draft B report;

to advise the pilot laboratory in preparing the text of the entry to Appendix B of the MRA as required, and to prepare a recommendation on these subjects for approval by the CCT;

to prepare guidance documents on identifying significant deviations for use by the pilot laboratories; and

to advise the pilot laboratory in preparing a comparison status document, and to prepare a recommendation for this summary for the CCT.

Working Group 7 is tasked with continuing the oversight of ongoing key comparisons, and with the production of guidance documents on comparison deviations. Including pilot laboratories of ongoing and completed CCT key comparisons in the membership of this working group captures and preserves the experience and lessons learned during previous comparison exercises.