Adaptation projects specifically benefit from having a clear rationale, with particular attention on four main elements: the presence of worsening climate hazards, either now or in the future; evidence for the diverse ways in which these hazards affect people and places; interventions that clearly address the impacts of climate change; and effective monitoring, evaluation, and learning. To strengthen shared understanding among the GEF Partnership of good practices for increasing adaptation impact and to help ensure that projects have a robust adaptation rationale, STAP has developed a decision tree for project developers to use at an early stage in project design.