Modern manufacturing companies operate in conditions of intensive market changes, where increasing demand variability, shortening product life cycles and increasing competition constitute fundamental challenges. In response to them, tools based on the Lean Manufacturing philosophy are gaining importance, aimed at eliminating waste, improving flows and maximizing the value delivered to the customer. Additionally, the integration of Lean tools with modeling and simulation techniques is gaining importance, enabling virtual testing of changes and predictive analysis of the effects of implemented solutions. The aim of this paper is to present the potential resulting from the complementary use of Lean Manufacturing tools and simulation modeling in the context of improving manufacturing processes. The presented analysis is based on the case study of company producing ski lift. The proposed approach provides effective support for decision-making processes, enabling precise identification of areas requiring intervention, testing of possible improvements and determining possible effects, including shortening the production cycle, reducing the volume of work in progress and increasing of production volume. The main goal of the analyses was to check the possibility of increasing production from 10 to 30 pieces per week and shortening the total production cycle time by at least half.