PASLINK is the grouping of 14 European research institutes involved in the performance assessment of the thermal and solar characteristics of building components under real climate conditions. Most of the members are performing semi-standardised tests using the PASSYS/PASLINK test cells. IQ-TEST is the European thematic network project aiming at further developing common quality procedures for testing, calibration, data gathering, cleaning and analysis, interpretation of test results and scaling/replication to real buildings, maintenance of test infrastructure.