The aim of this paper is to describe the help of simulation as should look like expansion of production in the manufacturing plant. The establishment of a simulation models, we used a software product from Siemens PLM Software and Tecnomatix Plant Simulation. The paper describes the current production model, which the principle for is the extension of production planning. Using a simulation model is drawn up to include layout work on a planned workforce newly built production line at the company. The introduction is described some basic concepts. When analyzing business processes and developing their models clarified are some procedures work in Plant Simulation software module