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June 2025 - IRIS+ v5.3b Released (current version)
No change.
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December 2024 - IRIS+ v5.3a Released
No change.
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June 2022 - IRIS+ v5.3 Released
Immaterial change. Minor revision to usage guidance for clarity.
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May 2021 - IRIS+ v5.2 Released
Immaterial change. Minor revision to usage guidance for clarity.
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January 2020 - IRIS+ v5.1 Released
No change.
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May 2019 - IRIS+ v5.0 Released
No change.
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March 2016 - IRIS+ v4.0 Released
Immaterial change. Minor revision to metric name in order to align with the catalog's structure and style.
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March 2014 - IRIS+ v3.0 Released
Immaterial change. Minor revision to definition language for clarity.
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November 2011 - IRIS+ v2.2 Released
No change.
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February 2011 - IRIS+ v2.1 Released
No change.
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September 2010 - IRIS+ v2.0 Released
Material change. Total Employee Training Costs (OI7390) replaced Cost of Training (OT33). Metric modified to increase accuracy by expanding to include all employees, not just full-time.
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September 2009 - IRIS+ v1.0 Released
New metric. Cost of Training (OT33) was developed via the Original IRIS Working Group.