In the early phases of a sudden onset or rapidly changing complex emergency, performing the basic information management (IM) functions can be a challenge. Yet, these core services are imperative to an effective emergency response.
SOP - Information Management Unit Sudden-onset Disaster Context, 2018
IM Strategy - Typhoon Yolanda (2013)
Emergency Response in OCHA_2017.pdf
Unofficial Guidance for OCHA Information Management in Sudden Onset Emergencies (2014)
For more information on Guidance Documents (essential and recommended reading for OCHA IMOs)