1.1 ScopeThis technical report provides guidance for plan development for various workplaces, such as manufacturing facilities, educational and healthcare institutions, sports and entertainment events and religious gatherings on the subject of an active shooter/armed assailant attack.1.2 PurposeThis report addresses the development of an active shooter/armed assailant plan, including:how to initiate the planhow to conduct exercises to test the planenvironmental measures that can be taken at facilities to enhance securityand involvement of outside resources to respond to active shooter/armed assailant scenarios