There has been a lot of stories lately about the Transportation Security Administration (TSA), and most have been less than flattering (to say the least). How can an agency that was designed to “serve and protect” the citizens of the United States from harm evoke such wrath from ordinarily shy and non-vocal travelers? This blog is about product design, and so my analysis of the situation will treat this as a failure of product design. Where are the failures? Mistake #1 TSA Conceptual Design: Blocking There are bad guys out there that want to do us—citizen travelers from US—harm. There are the box-cutter carrying terrorists, the shoe-bombers, the liquid explosives bandits, the underwear-bombers, the printer cartridge explosives engineers. TSA installed airport security measures that would counteract each of these threats as they revealed themselves. The basic conceptual design strategy here is blocking: identify a threat and find an effective block. This is a strategy based on hindsight: if we knew that people could sneak bombs in their underwear, then we would have had a way to block it. We didn’t know, but now we do, and so we created systems to block this threat in the future. TSA Game Plan: Escalating…