March 2016 - IRIS v4.0 Released (current version)
Immaterial change. Minor revision to metric definition language in order to align consistency of metric with catalog's structure and style.
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. Target Beneficiary Setting (PD6384) replaced Location of Target Population Served (DES15). Metric modified to increase generalization by collapsing several urban subsectors into a single sector.
September 2009 - IRIS v1.0 Released
New metric. Target Population Served (DES15) developed via Original IRIS Working Group.