Consider you run a project where a key stakeholder is one of VPs. She is a typical hit-and-run type of person: she comes to a project team with half-baked idea, either refuses to discuss details because they're confidential or just throws some anecdote as a business story and expects everyone would start working on a project, whatever that might be.
To make things worse from time to time she bypass project leaders and just tell people what they have to do, no matter how disconnected it is with any project plan which was prepared.
Because of hierarchy she can't be ignored as the project team works under her. Also standard methods, e.g. trying to set some formal rules, don't work as she just ignore any arrangements she doesn't like.
How to deal with that kind of person? How to bring some order to the project?
Or maybe it's best option just to accept how the things look like?