How reliable are sprinkler systems? Is it 100%? Is it 95%? Maybe it is 88%... actually, whatever the number is, do we truly understand what does it represent? What does it mean that a sprinkler has succeeded and what does it mean it failed. These are the questions that were behind my today's interview with Arnstein Fedoy.  You may remember Arnstein from his short appearance in episode 26 . This time, we've had the whole episode for this discussion, and I must say it was well invested hour on my side.If you would like to learn more about sprinkler reliability, Arnstein also wrote a book exclusively on this topic:https://www.taylorfrancis.com/books/mono/10.1201/9780429287503/reliability-data-fire-sprinkler-systems-arnstein-fed%C3%B8y-ajit-kumar-verma