Things look good on paper but the true test is when someone is shooting at you with intent. Or as Mike Tyson wisely observed everybody has a plan until they get punched in the mouth.
That is exactly true. And that is when you make “adjustments“.
And hope at the same time, that you have enough time to make adjustments.
When we got our asses kicked in the Battle of Savo Island in 1942, we made a lot of adjustments after that, but the fight for Guadalcanal hung in the balance, and there was much wondering about whether we would have enough time to have those adjustments take affect and save the campaign.