[Behavioral] Tell me about a time you realized the real problem was internal, not the supplier.

One case that stayed with me involved repeated complaints about a supplier being unreliable. When I looked more closely, the supplier had some issues, but the bigger problem was that our own forecasts and approvals were unstable enough that the supplier kept getting blamed for noise we were creating ourselves.

I brought that forward carefully because it is easy for that kind of message to sound defensive of the...