This document is a comprehensive guide to the National Incident Management System Supporting Technology Evaluation Program (NIMS STEP). Evaluation activities are sponsored by the National Preparedness Directorate (NPD), Federal Emergency Management Agency (FEMA). This guide is designed to provide an orientation to the evaluation process and policies including vendor application requirements, product selection methods, evaluation activities, and post-evaluation review/reporting processes. Homeland Security Presidential Directive (HSPD)-5 directed the Secretary of Homeland Security to develop and administer the National Incident Management System (NIMS). In 2004, the Department of Homeland Security (DHS) released NIMS to provide a consistent nationwide template to enable governments and responders to work together effectively and efficiently to manage incidents and planned events. Although the incident management framework can be adaptable to any situation, NIMS provides a standard structure and management concepts that transcend all incidents, including: Accountability, Common Terminology, Comprehensive Resource Management, Information and Intelligence Management, Integrated Communications, Management Span-of-Control, Modular Organization, Unified Command Structure. The NIMS provides a framework and sets forth, among others, the requirement for interoperability and compatibility to enable a diverse set of public and private organizations to conduct well-integrated and effective incident management operations. Systems operating in an incident management environment must be able to work together and not interfere with one another. Interoperability and compatibility are achieved through the use of tools such as common communications and data standards. Establishing and maintaining a common operating picture and ensuring accessibility and interoperability are the principal goals of the Communication and Information Management component of NIMS. The NIMS STEP supports NIMS implementation by providing an objective evaluation of supporting technologies - the use and incorporation of new and existing technologies to improve efficiency and effectiveness in all aspects of incident management. The Incident Management Systems Integration (IMSI) Division of NPD has tasked the NIMS Support Center (NIMS SC) to support and manage the day-to-day functions of the program.