This video demonstrates how findings from an impact evaluation can guide decision-making in a humanitarian project. Paul, a senior monitoring and evaluation officer, evaluates the effectiveness of providing chlorine tablets alone versus combining them with safe storage containers to improve drinking water access. With the help of an impact evaluation specialist, Paul and his team discover that the combined approach significantly enhances water quality and is more cost-effective. The results lead to key organizational decisions, including adopting the combined approach in future programs and conducting further evaluations to confirm its effectiveness in other contexts.