Amount of energy that would have been used by the replaced product during the lifetime of the organization's product.
Organizations should footnote details on the product replaced, source for product utilization information, and other calculation assumptions.
This calculation should be for energy consumed by the product replaced over the course of the lifetime of the organization's product and not over the course of the product lifetime of the product that is being replaced.
In some contexts, this metric can serve as an indicator of whether the outcome being sought by an investor or organization is occurring (the WHAT dimension of impact). For more on the alignment of IRIS metrics to the five dimensions of impact, see specific guidance document. No single metric is sufficient to understand an impact; rather, metrics are selected as a set across all dimensions of impact. When possible, the selection of metrics to measure and describe the five dimensions should be based on best practice and evidence.
April 2021 - IRIS v5.2 Released
No change.
December 2019 - IRIS v5.1 Released
No change.
April 2019 - IRIS v5.0 Released
No change.
February 2016 - IRIS v4.0 Released (current version)
No change.
February 2014 - IRIS v3.0 Released
Immaterial change. Minor revision to definition language for clarity.
October 2011 - IRIS v2.2 Released
No change.
January 2011 - IRIS v2.1 Released
No change.
August 2010 - IRIS v2.0 Released
New metric. Energy Used by Product Replaced (PD5578) developed via Environment, Energy & Water Working Group.
IRIS Metrics Work Better in Sets
To use IRIS metrics—and the resulting data—to understand impact performance, IRIS metrics should be used and analyzed in generally accepted sets and according to well-defined objectives. IRIS+ gives you access to generally accepted Core Metrics Sets aligned to common Impact Themes and Sustainable Development Goals (SDGs).