In light of the growing recognition of the weaknesses in the multilateral humanitarian response, the Inter-Agency Standing Committee (IASC) Principals decided to review the current approach to humanitarian response and make adjustments, building on the lessons learned in 2010 and 2011. Based on an analysis of current challenges to leadership and coordination, the IASC Principals agreed in December 2011 to a set of actions that collectively represent a substantive improvement to the current humanitarian response model.