The main goal of this ALNAP and CDA initiative is to produce an evidence-informed guidance for humanitarian agencies on strengthening the effectiveness of feedback mechanisms for affected populations in humanitarian contexts. A working definition of humanitarian feedback mechanisms adopted for this study is provided in Box A below. More specifically this research has two objectives: 1. Identify which features of feedback mechanisms for affected populations are most likely to contribute to the effectiveness of such mechanisms as perceived by different user groups – including first and foremost, the crisis affected communities. 2. Provide robust, evidence-informed guidance to ALNAP network members on which elements should be identified and prioritised to help strengthen the overall effectiveness of a feedback mechanism for affected populations in a humanitarian operational setting.