Discrete-event simulation improves the possibility to study manufacturing systems. The use is increasing compared to previous studies and 15% of 80 companies investigated are using the tool and of these four companies extensively. The main advantage according to the survey beside the visualization part is that the knowledge about a system is investigated and documented. Other benefits can be basis for new investments and improvements of existing manufacturing lines. Of the companies that have adopted the technology, 79% answered that discrete-event simulation facilitates the decision-making process. Finally, the findings indicate that the potential of the software would be further increased if combined with adequate production improvement techniques to increase overall efficiency of a manufacturing system. Key words: Discrete-event simulation; survey; manufacturing industry