The document discusses impact mapping as a method for project planning and alignment. Impact mapping involves visually mapping out the goals of a project, the key actors involved, desired impacts or behavior changes, and deliverables. This helps ensure the project is solving the right problem and that intended impacts are measurable. It is suggested that impact maps be used to make hypotheses and solutions explicit, provide strategic control over projects, and allow testing solutions in smaller batches aligned with risks and potentials. The document provides examples of impact maps and argues that every project should have clarity on its expected outcomes in terms of hierarchical behavior changes.