Your question is Phased Rollout Design. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How would you design a phased rollout for a new internal tool?
Explain how you would determine rollout stages, select pilot users, define readiness criteria, coordinate stakeholders, collect feedback, and decide whether to expand, pause, or roll back. Address communication, training, support coverage, adoption measurement, and risk mitigation. Describe the deliverables and decision points you would use to manage execution from pilot through broad availability.