Ultimately this is what management is at least nominally supposed to do: decide values, set standards, and ensure that people down the chain are strategically aligned and have an environment where everyone is working together. That includes Andy Grove's "getting people to resolve their own differences" and other meta tasks. But fundamentally the person in charge is responsible for everything, even though they can't know everything.

Any RCA that doesn't provide useful feedback to management up and down the chain is missing pieces, but there's lots of discussion elsewhere in this thread about that by people better at elaborating than I am.