March 2016 - IRIS v4.0 Released (current version)
March 2014 - IRIS v3.0 Released
November 2011 - IRIS v2.2 Released
February 2011 - IRIS v2.1 Released
Material change. Permanent Employees (OI8869) replaced Total Employees (OI9255). Metric name and definition language modified to increase specificity by eliminating temporary employees.
September 2010 - IRIS v2.0 Released
Material change. Total Employees (OI9255) replaced Size: Employees (DES10). Metric modified to increase specificity.
September 2009 - IRIS v1.0 Released
New metric. Size: Employees (DES10) developed via Original IRIS Working Group.