March 2016 - IRIS v4.0 Released (current version)
Immaterial change. Minor revision to metric name and definition language for clarity.
March 2014 - IRIS v3.0 Released
Material change. Water Savings from Services (PI2884) replaced Water Savings. Metric name and definition modified to provide clarity based on best practices and standard guidance.
November 2011 - IRIS v2.2 Released
February 2011 - IRIS v2.1 Released
September 2010 - IRIS v2.0 Released
New metric. Water Savings (PI2884) developed via Environment, Energy & Water Working Group.