March 2016 - IRIS v4.0 Released (current version)
Material change. Metric definition language and reporting format modified to maintain consistency with changes to IRIS structure.
March 2014 - IRIS v3.0 Released
Immaterial change. Minor revision to definition language for clarity.
November 2011 - IRIS v2.2 Released
February 2011 - IRIS v2.1 Released
September 2010 - IRIS v2.0 Released
Material change. Employment Benefits (OI2742) replaced Healthcare Benefits (OE11). Metric modified to increase information base beyond health care.
September 2009 - IRIS v1.0 Released
New metric. Healthcare Benefits (OE11) developed via Original IRIS Working Group.