As most would agree, this was much, much too late. You must remember that you will be the person called on the carpet if and when things fail. There is a reason that military organizations run war games exercises. More is learned from what goes wrong in an exercise than what goes right. Yes, it can be embarrassing to have your flaws exposed, but it is very important that you find the flaws so they can be corrected before you actually go into battle.
Bruised egos are much easier to repair than wounded soldiers.
The first step is exposing and dealing with any known flaws with the system. There is no reason a system should be running with known flaws. This is like driving around with a unusable spare tire in your car. It is only a matter of time before the flaw leaves you stranded. Next, set up a testing scenario.