So much stuff to write about, I broke it up into two parts. Part 1 is available here. Keynote #4: Staying Alive: patterns for Failure Management from the Bottom of the Ocean Deep water SCUBA diving is both complex and fatally dangerous. Therefore, systems and practices are put into place to ensure that failures are contained and not cascaded. We build safety in complex systems, but these systems cascade failures from one system to the next (system integrations anyone?). How do we contain the failures? Ronnie makes two solid points here: Unused safety systems don't exist Untested safety systems don't exist either. Unused and untested safety systems are more dangerous than nothing at all. If failure is inevitable, a safety system built with the purpose of containing a failure that is untested is an unknown. What is risk? Risk for divers is based on two things: the chance of occurance the chance of regret if it does occur For a diver, the...