RT Journal Article SR Electronic A1 Sujová, Erika A1 Střihavková, Elena A1 Čierna, Helena T1 An Analysis of the Assembly Line Modernization by Using Simulation Software JF Manufacturing Technology Journal YR 2018 VO 18 IS 5 SP 839 OP 845 DO 10.21062/ujep/187.2018/a/1213-2489/MT/18/5/839 UL https://journalmt.com/artkey/mft-201805-0025.php AB The article deals with the optimization and modernization of assembly systems by creating models in the simulation software. The creation of digital models is a current trend in enterprise digitization called Industry 4.0. The Tecnomatix Plant Simulation environment allows you to create a virtual model of a real assembly line with the input of its basic production parameters. To perform the analysis, 8 real assembly lines were used, with an average of 15 workplaces, which were integrated into one universal line by means of simulation. The aim was to analyse the effectiveness of the proposed modernization universal assembly line using the generated statistical data.