The metalworking sector has experienced continuous growth in production over recent years, fueled by the rise in industrial exports and associated activities. As a result, evaluating production processes has become increasingly important. One of the most significant challenges for companies in this sector is the warehouse picking process. A key factor in this process is the time required for completion, as excessive delays can lead to production bottlenecks. This study proposes the implementation of Lean Manufacturing tools, Systematic Layout Planning (SLP), and barcode technology to optimize picking time in the warehouse of a small or medium-sized metalworking enterprise. Following the implementation of these tools, the company successfully redesigned the warehouse layout, achieving a 71.15% reduction in picking time and eliminating rework.