Abstract
ISO/IEC 17043 Conformity assessment—general requirements for proficiency testing is intended to replace previous international guides used to assess the competence of proficiency testing (PT) providers. It expands on the requirements of previous guides and is intended to accommodate PT providers of calibration laboratories and testing laboratories handling both qualitative and quantitative data. QMP-LS is an office-based external quality assessment provider for medical laboratories in Ontario, Canada and operates 46 different PT schemes for approximately 250 diagnostic tests. In 2010, these schemes were accredited to ISO/IEC 17043. Schemes included tests from the following disciplines: chemistry, hematology, microbiology, transfusion medicine, cytology, histology and genetics. Thirty of the schemes were qualitative. The challenges and benefits of implementing ISO/IEC 17043 are discussed, with particular emphasis on clauses addressing the following requirements: statistical design, determination of assigned value, homogeneity and stability testing, packaging, labeling and distribution, performance evaluation and subcontracting services.
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