In units that have a considered plan for their members, this progression is worked out in great detail with allowance for an orderly development in all of the three categories that are concerned in promotion. Teaching functions and the setting up of courses should take priority. Then, in those units where scholarly output is heavily weighted, a research program should be mounted and, finally, some shouldering of service responsibilities should be undertaken. A new assistant professor should not be heavily laden with service commitments in the first year. The entire commitment should be under the guidance of senior people who should take an active role in career development.