[Supplier] How do you handle a supplier who is responsive in meetings but poor in execution?

I would separate relationship quality from performance quality. A supplier can be pleasant and still create real business risk. So I would bring the conversation back to commitments, dates, failure patterns, and the effect on the operation rather than letting the discussion get carried by good meeting behavior.

If the supplier wants to improve, I would expect a concrete recovery plan and measurable follow-through. If...