Promotion in faculty rank is given by the Medical School and University of Michigan only after a lengthy process of evaluation involving your academic department, external evaluators, committees within the Medical School, the Dean — and for higher levels of the faculty ladder, the EVPMA, the Provost, and the President.
Academic promotion is generally not a reward for services rendered, but the reward for scholarly work that adds significantly to your field, as well as for important contributions in clinical activities, teaching, and administration.
Faculty should define their goals, and then discuss their career path and timelines for promotion with their chair or the chair's delegate. Promotion is at the discretion of the chair.
Usually, departmental committees meet in the spring for the next year's promotion cycle.