If you work for an NGO, you likely face the challenge of “demonstrating impact and effectiveness” to your funders. Yet donor states and international organizations no longer blindly accept that NGOs are doing what they claim to do. So the task is not only to meet expectations, but also to communicate the organization’s most significant impacts to donors, other partners, and professional colleagues. Measuring organizational effectiveness for improved health and development impact is a key element to do so in a changing landscape.