This publications, one of two, presents the final results of a collaborative project on Operationalizing Human Security (OPHUSEC), carried out by DCAF, the Laboratory of Urban Sociology at the EPFL Lausanne (EPFL-LaSur), the National Centre of Competence in Research (NCCR) North-South at the Centre for Development and Environment (CDE), University of Bern, and the Swiss Peace Foundation (swisspeace). The project was funded by SDC and the Swiss National Science Foundation. It examined the link between human security analysis and human security provision to improve the lives of people living in threatened communities and to sensitize security providers about means and ways to channel existing resources and capacities more effectively towards the alleviation of serious threats in specific local contents.  Operationalizing Human Security: Tools for Human-Security-Based Threat and Mitigation Assessments (Cahier 21) offers a series of practical suggestions and tools to allow the replication of some or all of the project’s practical assessment and mitigation components.