Almost any job or profession you can think of has a set of specific requirements for knowledge and skill that must be mastered. Managing and supervising the work of others is an exception. In part that is because the job of managing requires a range of social and technical skills that can vary widely depending on business circumstance. An infinite diversity of technologies, materials, markets and work skills can figure into the mix of the manager's job. The manager may be asked to coordinate technically skilled team players, or, alternatively, may need to discipline the application of basic...