A Cluster is a representative term for a group of assisting organizations linked by a common activity. It includes a variety of stakeholders that meet regularly on a voluntary basis and take decisions by consensus or majority vote. There are over 40 Cluster members namely international and national Non-Governmental Organizations, International Organizations, representatives of Donor's Community and the Government of Haiti. The International Organization for Migration (IOM) has been the Lead Agency for the Camp Coordination and Camp Management (CCCM) Cluster since the Earthquake in January 2010 and for the combined Emergency Shelter and CCCM Cluster since September 2011.
See also: http://www.humanitarianinfo.org/iasc/pageloader.aspx?page=about-default
The focus of the Emergency Shelter and CCCM Cluster is on: camp management activities, provision of emergency assistance, transitional shelters and distribution of non-food items. The core functions of the Cluster are: coordination with various stakeholders, preparedness and capacity building, needs assessment and planning, information management and reporting, application of international standards, monitoring of cross cutting issues, advocacy and resource mobilization.