I think there are a lot of lessons here. Here is what I got: One is that the simple $20 solution was discovered, but it may never have been. There was an eleme

I think there are a lot of lessons here. Here is what I got: One is that the simple $20 solution was discovered, but it may never have been. There was an element of luck in that. How often has that been the case in software? I see it all the time. Given there is an element of luck, to maximise luck you want to pull in ideas from many places. Line workers are a great source of ideas. You can then apply a filtering process to decide which idea to try out. The fan idea would be tried out due to it being a low hanging fruit sort of fix.