Even though the evolution of sustainability metrics and methodology has advanced significantly over the past decade, social sustainability at product level was still relatively immature. Complex issues had not been addressed sufficiently. Triggered by these practical shortcomings, a group of experts from large companies decided to join forces, initiating the Roundtable for Product Social Metrics. This collaboration resulted in the development of the Handbook for Product Social Impact Assessment, building on the participant companies’ approach and existing standards at global level. While developing the handbook, the participants also engaged with external stakeholders who helped improve the handbook at different levels of collaboration. The results of the first two phases of the Roundtable for Product Social Metrics are documented in the version of the handbook available for download on this website.