This document discusses different bases for promotion: seniority, merit/ability, and a combination of seniority and merit. It defines a promotion as movement to a higher job classification and title change. Seniority prioritizes employees with more time at the organization, focusing only on longevity. Merit/ability bases promotion on performance evaluations and competency. Combining seniority and merit considers both experience and ability, promoting seniors while also selecting talented young employees. The document outlines advantages and disadvantages of each approach.