The EVA Survtool: An Integrated Framework to Plan Health Surveillance Evaluation

Currently available frameworks for evaluation of surveillance systems in animal or human health often treat technical, process, and socioeconomic aspects separately instead of integrating them. The surveillance evaluation (EVA) Survtool, a support tool for the evaluation of animal health surveillance systems, was developed to provide guidance for integrated evaluation of animal health surveillance including economic evaluation. The tool was developed by international experts in surveillance and evaluation in an iterative process of development, testing, and revision; accounting for existing frameworks and guidance, scientific literature, and expert opinion elicitation. The EVA tool encompasses a web interface for users to develop an evaluation plan, a Wiki classroom to provide theoretical information on all required concepts, and a generic evaluation work plan to facilitate implementation and reporting of outputs to decision makers. The tool was used to plan and conduct epidemiological and economic evaluations of surveillance for classical and African swine fever, bovine virus diarrhea, avian influenza, and Salmonella Dublin in five European countries. These practical applications highlighted the importance of a comprehensive evaluation approach to improve the quality of the evaluation outputs (economic evaluation; multiple attributes assessment) and demonstrated the usefulness of the guidance provided by the EVA tool. At the same time, they showed that comprehensive evaluations might be constrained by practical issues (e.g., confidentiality concerns, data availability) and resource scarcity. In the long term, the EVA tool is expected to increase professional evaluation capacity and help optimizing health surveillance system efficiency and resource allocation for both public and private actors of the surveillance systems.

The EVA Survtool is freely available online ( and is shared under the principles of the noncommercial Creative Commons license 2017 (i.e., the tool can be freely used and shared for any noncommercial purposes but appropriate credit should be given, providing link to the license and changes made should be indicated). The tool is linked to the surveillance evaluation Wikispace (, which is also freely available.



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