Unforeseen Events, Resilience, and PRA

I gave a presentation at the second Resilience Engineering Symposium on November 6th, 2006.  The accompanying article was included in the book, Resilience Engineering: Remaining Sensitive to the Possibilities of Failure, E. Hollnagel, et. al, editors (Ashgate Press), 2007, under the title “Unexampled Events, Resilience, and PRA”. The words of the presentation have remained the …