"The PSC [Planning Section Chief] is a member of the General Staff and is responsible for the collection, evaluation, dissemination and use of information about the development of the incident and the status of resources. The PSC is responsible for facilitating the planning process and ensuring the safety and welfare of all Planning Section personnel. Current information is needed to understand the current situation, predict the probable course of incident events, and prepare alternative strategies and control operations for the incident."
Coffee Break Training - Command and Control Series No. CC-2013-11
United States Fire Administration: http://www.usfa.fema.gov/