ECA 4-18 : 2010

1. Introduction
2. Terms and Definitions
3. General Aspects
4. Level and Frequency of Participation
5. Case Studies
Case Study 1 - Environmental Chemistry Testing Laboratory
Case Study 2 - Microbiology Testing Laboratory
Case Study 3 - Clinical Testing Laboratory
Case Study 4 - Physical Testing Laboratory
Case Study 5 - Matrix Approach (Clinical Chemistry)

Assists harmonization between Accreditation Bodies on how the level and frequency of participation in PT is evaluated and to assist laboratories in determining their own levels and frequency of participation.