Facilitate a fair performance calibration meeting

Help me facilitate a performance calibration meeting with a group of managers. Group being calibrated: [team/function, number of employees, levels] Rating scale and definitions: [PASTE] Target or guideline distribution (if any): [e.g. none / guidance only] Pre-submitted ratings summary: [counts by rating per manager - optional] Time available: [e.g. 2 hours] Known challenges: [e.g. one manager rates everyone high, new managers, remote vs. office employees] Give me: 1. Pre-work for managers - what to bring for each person (evidence of results and behaviors against level expectations, not adjectives). 2. Agenda with timings - prioritize discussion time on borderline cases and top/bottom ratings rather than reviewing everyone equally. 3. Ground rules - confidentiality, evidence over impressions, compare to the level standard not to each other, everyone speaks. 4. Bias checks to call out live - recency, halo/horns, proximity (remote vs. in office), leniency/severity by manager, similarity, and patterns by gender, race, or leave status. 5. Facilitator prompts - e.g. "What's the evidence that this is above the level expectation?", "Would we rate this the same if someone else delivered it?" 6. Post-meeting checks - distribution by manager and by demographic group (where lawful), documentation of rating changes and reasons. 7. Template for recording each change and its rationale. Rules: only analyze demographic patterns where that data is lawfully collected, suppress any group under 5 people, and do not invent counts - work only from what I provide.