The paper presents the issue of rationalization (task of assembly line balancing) of the final assembly process on an example of main spindle of lathe centre CTX-210 (taken from the industry practice). The task of selecting the most favorable technological assembly organizational structure from the point of view of productivity using the modern tools for modeling a simulation of production processes Flexsim software is presented. The hitherto structure of a main spindle unit assembly process will be presented, together with a developed precedence constraint graph as well as algorithms making it possible to optimize utilization rate of assembly stations and their number. The final part of the paper presents the results and conclusions from conducted tests and analyses.
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