Since 1986, the research group holds one meeting every year with evaluation experts from national governments, audit institutions, universities and the private sector. Its present membership covers more than 20 countries across four continents.

INTEVAL members address cutting edge issues in a cross national perspective. Research works proceed by email and through subgroup meetings during the annual gathering. Research results usually take the form of co-edited books, most of them being part of the Comparative Policy Analysis Series (Transaction Publishers).