In the manufacturing planning process one of the main question is how many and what kind of employees we need to complete successfully orders and jobs. The best use of human resources at the shop floor level is one of the key issues. The problem is complex especially in unit and small batch production systems, where the changes in production program and production profile are much more frequent than in large batch and mass production ones, so it needs the computer support. This paper is focused on human resources planning at operational level, which deals with day-to-day work. The paper shows how different methods of scheduling influence human resource requirements.