How often is NFPA 921 revised?

The National Fire Protection Association (NFPA) 921 is revised every three years to ensure that the guidelines and procedures for fire investigations reflect the latest research, technology, and best practices in the field. This schedule allows for regular updates that incorporate new findings, making the document relevant and effective for professionals involved in fire investigation. The three-year cycle strikes a balance between ensuring timely updates and allowing sufficient time for the development and vetting of substantial changes or improvements in investigative methods and standards. Regular revisions are critical in fields such as fire investigation to adapt to emerging issues, technologies, and methodologies, thereby enhancing the overall efficacy and reliability of fire investigations.