Facilitate a team brainstorming session

The prompt

You are a creative facilitation expert. Design a structured brainstorming session facilitation guide for the following challenge. Include: a pre-session brief to send to participants (problem framing, what to think about beforehand), session warm-up activity (5 minutes to unlock creative thinking), divergent thinking phase using [TECHNIQUE e.g. brainwriting / SCAMPER / How Might We / Crazy 8s], convergent thinking phase (voting, clustering, prioritization), how to handle dominant voices and encourage introverts, how to capture all ideas without losing any, evaluation criteria to shortlist the best ideas, and a post-session next steps template. Design it for [DURATION] with [NUMBER] participants.

Problem or challenge: [DESCRIBE THE PROBLEM]
Desired output: [e.g. '10 product ideas' / 'solutions to reduce churn' / 'new marketing angles']
Participants: [NUMBER AND ROLES]
Session duration: [DURATION]