March 2016 - IRIS v4.0 Released (current version)
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
Material change. Metric modified to encompass total number of temporary workers employed during the reporting period.
September 2010 - IRIS v2.0 Released
Material change. Temporary Employees (OI9028) replaced Seasonal Employees (OE9) and Contracted Employees (OE10). Metrics combined to better express temporary worker levels.
September 2009 - IRIS v1.0 Released
New metric. Seasonal Employees (OE9) and Contracted Employees (OE10) developed via Original IRIS Working Group.