Many companies are addressing the low performance of individual employees. Management of multiple companies intend to prepare individual coaching programs for employee development. Before going into this work, on one side it is the development and improvement of the employees' results, but the other side is the overall strategic management of the company and the related set of rules within the company that often influences this performance. The company's overall analysis should be conducted and the results subsequently confirm these assumptions. Human mistakes account for a maximum of 15% on the causes of problems in the company and unsatisfactory results. 85% of mistakes come from a poorly configured system, a lack of strategic management. This thesis is properly simulated in the program Witness from Lanner group. In this paper, we are concerned with discovering bottlenecks in production and with the multiplier effect aimed at increasing production. All simulation results are presented and explained.