This document provides an overview of scenario planning as an approach to managing uncertainty in resource planning. Scenario planning explores a range of possible futures rather than predicting a single most likely outcome. It identifies key uncertainties that could significantly impact the future and develops narrative scenarios around different combinations of outcomes for those uncertainties. This allows decision-makers to identify actions that are robust across multiple scenarios. The document uses examples from water resource planning to illustrate how scenario planning can structured around key issues, uncertainties, and potential future scenarios. It emphasizes that the goal is not predicting the future but rather enhancing flexibility and strategic preparedness.