Background: As a response to the devastating tsunami in December 2004, The Cochrane Collaboration undertook to contribute to the relief effort by highlighting evidence of relevance to agencies and people making decisions about health care though a website called Evidence Aid (EA). At the Melbourne Colloquium, this working group agreed to continue its work to make EA a resource for all humanitarian and large scale emergency healthcare situations. EA brings together information on the effects of relevant healthcare interventions to support agencies and people working in the aftermath of a disaster, or other large scale healthcare emergency, to use interventions that will be of benefit. It aims to provide quick access to reliable information showing which interventions work, which don’t work, and which might be harmful. It is now timely to evaluate EA, to review the current and past use of EA, and to inform future developments. Objectives: To evaluate the strengths, weaknesses and opportunities for future development EA of the project by: (i) capturing the experiences of current and past users of EA; identifying the information needs of current and potential future users of EA and the organisations for which they work; and exploring the potential for EA to meet these information needs. Methods: This project will be undertaken in two stages. In stage 1, anecdotes and personal experiences of use of EA will be collected and compiled to develop a rich picture of how EA has been and is being used. In stage 2, interviews will be undertaken to explore the information needs of people planning for and working in situations of crisis or natural disaster and examine the potential of EA to meet these needs. Results: Interviews are currently underway and data collected will be presented at the Colloquium. Conclusions: The outcomes of this evaluation will be useful not only to Cochrane entities involved in the EA project, but will also enable EA to better meet the needs of clinicians and policy makers dealing with natural disasters and other crises.