The document provides guidance for developing health management information systems (HMIS) in developing countries. It outlines 12 steps for developing an HMIS, including reviewing the existing system, defining data needs, determining data flow, designing data collection tools, developing procedures for data processing, training, pre-testing the system, and monitoring and evaluation. It also provides examples and worksheets to demonstrate how to apply the steps. The overall aim is to provide a practical guide for developing effective and efficient HMIS to support health service management and planning.