People are the only living segment of business with the ability to think and learn and are different from other resources. In order to work successfully every day, they need to be trained and trained through various training programs. This paper will investigate whether the impact of staff training on enterprise efficiency is high, ie whether companies are advancing in investing in human resources in terms of increased employee income while simultaneously optimizing employee costs as well as having a positive impact on employees' satisfaction and reducing the number of injuries at work with the proper training, which is also a matter of research. The scientific aims of this paper will be: to explain the meaning of the concept and characteristics of the training process, to explore the training process and each phase, to explain the assumptions of successful training and learning, to explore which methods and techniques are used in the training of managers and non-managers, and to explain the reason for the need for training. The research goals will be: to determine the impact of staff training on the efficiency of the Split-Dalmatia County processing industry by means of Return On Assets (ROA), Return On Equity(ROE), Return On Investment (ROI), cost per employee and earnings per employee, does the training process have an impact on employee satisfaction, to examine whether the training of personnel reduces the number of injuries at work. The results of the research have shown that the training does not have a positive effect on increasing the efficiency of production medium and large companies in the processing industry of the Split- Dalmatia County. On the other hand, the results show that training has a positive effect on increasing employee satisfaction and reducing the number of injuries at work, which means that this research has helped both the author and the manufacturing companies to find solutions to solving the problems involved in the process conducting training.