When to use it
Use it at the end of a plan or announcement. A specific question that assumes concerns exist gets real answers. Most people won't speak up in response to “Any questions?” especially in a group.
Example
You: “What's one part of this plan that worries you?”
Teammate: “The timeline for testing seems short.”
You: “Good. Let's look at that.”
In an email or Slack message
For people who won't speak up in a group, add a written option: “If you'd rather share concerns privately, reply to me directly by Friday.”