ISO 20400:2017 Sustainable Procurement – Guidance is closely connected to ISO 26000 and therefore highlighted at this ISO 26000 website
The standards was published in ISO PC277 (project committee) that develop this one standard. France and Brazil held the project secretariate and more than 35 countries and 7 international liaison organizations participated.
Buy the standard at the ISO website or from your National Standards Body.
Some of the countries that have adopted ISO 20400 as a voluntary national standard are Argentina, Portugal, South Africa, Costa Rica, Ecuador, Chile, Belgium, Netherlands, Sweden, Germany, Australia.
For more information, please visit: iso20400.org
ISO 20400 SCOPE:
This document provides guidance to organizations, independent of their activity or size, on integrating sustainability within procurement, as described in ISO 26000. It is intended for stakeholders involved in, or impacted by, procurement decisions and processes.
ISO 20400 Table of Content, Introduction, Scope, Definitions can be found here.
ISO 20400 (DIS 2) Example of figure: Overview of Life Cycle Costing can be found here