Assumptions mapping is a simple, yet powerful tool that can improve the way you select the right projects to move forwards. Without testing the assumptions you have in relation to each project during a prioritization exercise, you will end up making decisions that are not evidence-based and are instead based on assumptions, anecdotes, and memories of what might not have worked in the past. In this aticle, Dennis Kennedy provides guidance on how to introduce assumptions mapping techniques into your project selection process in order to ensure that you are prioritzing the righ projects for the right reasons.