The furniture industry is developing dynamically and Poland is one of the leading furniture exporters in the world, which creates a significant opportunity for companies in this sector to use Lean Management as a strategic approach to improve processes and achieve competitive advantage on the market. This article analyses the main waste-related problems in a selected SME operating in the furniture industry. The aim of the study is to assess the impact of Lean solutions on employee work efficiency. The data necessary for the analysis were collected using the observational method within the company. In order to compare the effects of implementing the proposed Lean Management solutions, ratio analysis was used. The research findings led to the development of Lean Management solutions that meet the individual needs of the company and involve the elimination of waste. The effects obtained were presented using the indicator method, comparing the efficiency improvements achieved with the original state before implementation. The introduction of Lean solutions, namely standardization, Visual Management, Kaizen, and 5S, resulted in an improvement in the efficiency indicator, particularly in the context of employee working time. The efficiency indicator was assessed in relation to the employee working time. The increase in efficiency ranged from 15 to 77 percentage points. These results clearly indicate that the introduced solutions increased employee efficiency and accelerated the production process.