This document provide an an exhaustive and structured review of methods, which have been incorporated by humanitarian agencies or that are of potential for use in estimating human population size in an emergency context.

This study aims at reviewing how needs are presented and analysed in 18 Appeals (Initial and Revised) of nine major crises over the past three years in order to identify best practices and major shortcomings for improving the development of future Flash Appeals.

To better understand the information needs of emergency decision makers in the immediate aftermath of a disaster, ACAPS has collected and analysed information needs from different organizations to improve information about needs being made available to emergency decision makers within the first days of a crisis.