When to use it
Use it when you need a decision, not open-ended input. Ask for a specific confirmation by a date, and say what you'll do if you don't hear back. Work keeps moving, and the other person can stay silent if they agree.
Example
You: “Can you confirm option A by Tuesday? If I don't hear back, I'll proceed.”
Manager: “Confirmed. Go ahead.”
In an email or Slack message
Only use the “I'll proceed” default for decisions that are reasonable to make without them. For big or risky calls, ask for an explicit yes instead.