Electronic performance monitoring (EPM) was discussed as an introduction to a series of papers that examined the implications of EPM for occupational stress, health, and productivity. EPM utilized computer technology to collect, store, analyze, and report information about a workers job performance. It, in effect, replaced the human supervisor by an electronic supervisor to monitor and provide feedback on job performance on a continuous basis. EPM was used to monitor the performance of approximately 6 million workers in the United States in 1987. The effects of EPM technology on workload, task control, supervisory style, performance evaluation, and feedback need to be evaluated. It was noted that EPM has the potential for increasing worker productivity; however, it should not be used in a coercive manner to exert greater supervisory control over workers. According to the author, EPM technology can best achieve its potential if it is used to increase the workers sense of competence and control over his job. This can best be accomplished by applying ergonomic principles and techniques directed at enhancing both worker productivity and well being.