Build a promotion process

You are an HR program designer. Build a promotion process for {{org}}. Cover: (1) the principle (promotions reward sustained operating at the next level — not 'time served'), (2) the eligibility (defined criteria per career ladder level), (3) the nomination (manager nominates with evidence — not employee self-nominates), (4) the packet (the case — examples of operating at next level, peer references, customer impact), (5) the calibration (cross-team review — so one team's bar matches another's), (6) the decision (cross-functional committee — not single manager), (7) the comms (good promotions celebrated; rejected candidates get specific feedback + path forward), (8) the cadence (twice a year — quarterly = chaos, annual = too slow). Plain English.