This document discusses social impact assessment (SIA), which focuses on how development proposals impact people and communities. SIA aims to reduce harm, enhance benefits, and establish better stakeholder relationships. The document outlines the types of social impacts that can be assessed, including lifestyle, cultural, community and health impacts. It also describes the common steps in SIA, which include public involvement, identifying alternatives, establishing a baseline, impact projection, evaluation and mitigation. Principles of good practice include involving the public, analyzing equity impacts, and establishing monitoring programs. Sources of information include project data, surveys, and experts. Common prediction methods are also presented, as well as good practices for impact mitigation and management. The document notes SIA