Gender impact assessment is a way to estimate the expected impact of an intervention, such as a development project, on women, and to what extent the specific interests and needs of various categories of women will be affected. Such assessment provides information relevant to project planning, and should preferably take place before a project begins. This book presents three case studies from Burkina Faso, India and Bolivia in which this method was used, plus an introduction to the methodology, conclusions regarding its use, and the lessons to be learned from the studies.