Please scroll down for article-it is on subsequent pagesINFORMS is the largest professional society in the world for professionals in the fields of operations research, management science, and analytics. For more information on INFORMS, its publications, membership, or meetings visit http://www.informs.org INFORMS 2012 c 2012 INFORMS | isbn 978-0-9843378-3-5 http://dx.Abstract The increase in natural and man-made disasters in the recent years has highlighted challenging problems in humanitarian operations, in addition to major long-term humanitarian development challenges. Humanitarian logistics plays an important role in preparing for, responding to, and recovering from sudden-onset disasters and addressing long-term development issues. The management of humanitarian logistics operations involves many challenges such as conflicting objectives from multiple stakeholders, coordination and collaboration, high uncertainty, and scarcity of resources. In this tutorial, we provide an introduction to humanitarian logistics and its main application areas while outlining current research trends and the major challenges faced in the area today. We also present four decision aid tools addressing typical applications of humanitarian logistics: network design for donated human breast milk delivery in South Africa, port simulation and shipment scheduling for a large international agency, demand estimation and emergency procurement for CARE, and postdisaster medical response under accessibility issues. In presenting these decision aid tools, we aim to underline the differences in issues arising from sudden-onset disasters and long-term development problems, various stages of the life cycle of disasters, and different decision levels, while also pointing to general aspects in modeling humanitarian logistics problems.