OCHA is the part of the United Nations Secretariat responsible for bringing together humanitarian actors to ensure a coherent response to emergencies. OCHA also ensures there is a framework within which each actor can contribute to the overall response effort. 

OCHA's mission is to:

• Mobilize and coordinate effective and principled humanitarian action in partnership with national and international actors in order to alleviate human suffering in disasters and emergencies.
• Advocate the rights of people in need.
• Promote preparedness and prevention.
• Facilitate sustainable solutions.