PT. XYZ is a small to medium business engaged in producing children's apparel that produces various product designs, such as jumpsuits, dresses, and clothes for children from 0-1 years old. PT. XYZ still has problems in the production sector, such as the missed production process, the production layout, which is considered ineffective compared to production standards. The Warehousing system is dangerous and takes massive time and energy. So the researchers conducted direct observations and implementations in the field using data obtained from operations such as the amount of production, flow, time, and the number of employees. The new layout is processed by using a systematic layout planning method. SLP method calculation consists of  From To Chart (FTC), Operation Process Chart (OPC), Routing Sheet, Multi-Product Process Chart (MPPC), Activity Relationship Chart (ARC), Activity Relationship Diagram (ARD), Area Allocation Diagram(AAD), and flow processes to design new layouts and use shared storage methods Throughput, Assignment, Calculation of needs and space. After being processed, the results of the 2 alternative designs have effectiveness, distance, and shorter time than the initial layout. From the two alternatives, simulations were carried out using the Flexsim application and compared the time and production throughput. Alternative number one was chosen because the production throughput was 2 more pieces than alternative 2, with an increase of about 11.4% compared to the initial layout. The final step is implementing the final design that has been selected at the production site.