Objectives: The purpose of the evaluation is three-fold: (i) Assess the extent to which immediate and longer-term responses and strategies were guided by timely, relevant and adequate coordination arrangements and address the basic questions of: What was done well and why, and what could have been done better and how? (ii) Distil lessons learned for improving coordination practice for future crisis response, and recovery systems and processes i.e. in what way can future coordination arrangements be better organised, and their tools and services rendered more effective? (iii) Serve as a test case for undertaking joint but parallel inter-agency evaluations within a larger umbrella evaluation effort, the Tsunami Evaluation Coalition.