is a project that aims to assist policymakers in designing a comprehensive health-systems intervention to make Bangladesh’s health system more responsive. It will do so through assessing the current system of collecting, and responding to, feedback from health service users at sub-district (Upazila) level; and designing a comprehensive health systems intervention to improve utilisation of user feedback in health service quality assurance and human resource management processes at Upazila level. It is a multi-disciplinary and mixed-method health systems research study, using Realist Evaluation.