John Hall, NFPA's division director of Fire Analysis and Research, discussed these redundancies at the Suppression, Detection and Signaling Research and Applications Conference (SUPDET) in Orlando during the first series of sessions on suppression. During his presentation, Dr. Hall provided a "redundancy analysis" that uses risk-based language and criteria to evaluate the relationship of fire protection strategies.
Dr. Hall also provided a few real-world examples of fire protection redundancy, including sprinklers and passive fire protection (or, barriers to fire spread). Dr. Hall notes there is limited data on the latter, yet there exists a listing of major fires where the inadequacy or poor performance of a system feature was identified during an incident. If more data were available, argues Dr. Hall, then we could begin to quantify the interaction of passive fire protection with sprinkler systems.
Read the abstract of Dr. Hall's presentation.