National Incident Management System Emergency Operations Center How-To Quick Reference Guide [open pdf - 2MB]
From the Introduction: "The routine, day-to-day management of government differs greatly from emergency operations. During an emergency, effective decision-making relies on leaders' ability to collect emergency-related information, which requires close coordination between key officials from a variety of agencies and departments. Having a central facility such as an Emergency Operations Center (EOC), from which leaders can coordinate and direct emergency efforts, is essential for emergency response and recovery. Governments, jurisdictions, municipalities, nongovernmental organizations (NGO) and members of the private sector, at all levels, should prepare for the possibility of an emergency that will significantly change operating procedures. Governments must be ready to direct and control emergency operations. [...] The purpose of this all-hazards how-to guide is to provide state, local, tribal and territorial (SLTT) jurisdictions with information and guidance related to setting up, operating, maintaining and deactivating an EOC that successfully meets the jurisdiction's needs. This guidance applies an all-hazards approach in its concepts, processes and principles. FEMA recognizes that certain hazards (such as COVID-19 [coronavirus disease 2019]) may have specific implications, precautions and instructions that take effect under certain conditions and threat environments."
Federal Emergency Management Agency: https://www.fema.gov/