Reactive management is sometimes unavoidable. Proper planning is crucial, but there will always be issues that arise that either you couldn’t or didn’t foresee. Things happen. Having a robust system to ensure that any problems are solved quickly is vital. As jb678 said proactive is better than reactive. We’re only human. We can’t always see every possible outcome. What we can do is prepare and be ready to face those possible outcomes as quickly as possible.