Attack the problem, not every person standing near it.

When something goes wrong, there is a strong pull to find a person to hold responsible, and that pull almost always makes the problem harder to solve. People who feel attacked defend themselves rather than help, information stops flowing, and the actual fault stays hidden inside the defensiveness. Keeping your force aimed at the problem is not softness, it is what leaves you able to fix it.

In the next difficulty, try opening with what happened rather than who caused it. Ask what would prevent it next time instead of asking who let it through. The person who made the mistake is usually the one who knows most about how it occurred.