> They usually overlook that software requirements vary greatly and can be quite complex Or change after it's built. "Oh yeah, I guess we'll also need a floor

> They usually overlook that software requirements vary greatly and can be quite complex Or change after it's built. "Oh yeah, I guess we'll also need a floor to set our chair on. And perhaps a foundation for that floor." Later: "I know I said I wanted a chair, but what we really wanted was a glider."