Bob Greene: There's a lot of confusion about this whole value thing. What the heck is value? And we've joked around with it quite a bit on the podcast. Well, one of the things that I do as part of the package of engineering and my sector of that is energy simulations for buildings. So you can do that beautiful invisible work and provide that end result of just comfort consistently throughout a building without any problems being used. He says there are firms that do mechanical engineering very, very well and they come up with amazing designs that provide comfort.