Distribution systems drive energy and societal transition. System planning enables investments to be made in the right place, at the right time and with the right technology. Distribution System Planning is centered on the evolution of planning methods that will best support this transition, and describes the historical context and concepts that enable planning, its challenges and key influencing factors to be grasped. It also analyzes the impact of the development of renewable and decentralized energy resources, government recommendations and distributor initiatives to promote their integration. Through the use of case studies, this book provides examples of how planning methodologies have evolved, as well as an overview of new and emerging solutions.