The most expensive mistake is the one nobody can safely be wrong about until after the money is gone.
Game Tape Review is the opposite. In the book, I describe it as a recurring plan-performance review: not blame, but cheap error study. You put the tape on the screen while the miss is still small, compare plan to reality, and make public wrongness normal before it becomes a political event.
We built this in construction for a simple reason. By the time truck backups were visible on a night paving job, the waste was already baked in hours earlier. The real failure came earlier: over-ordering under uncertainty. But that uncertainty was not socially admissible until it showed up as obvious waste.
That is why Game Tape Review matters. In a fast-moving environment, errors do not stay cheap for long. If people can only admit they were wrong after failure is undeniable, you get theater on the way up and blame on the way down. Build the review while the error is still small.