Textile industries in emerging markets often faced persistent quality problems in garment stamping processes, where defects increased costs and limited competitiveness. Previous research on Lean Manufacturing primarily examined large companies or isolated practices, leaving a gap in evidence for SMEs and for stamping operations in particular. This study addressed the urgent need to reduce defective garments and stabilize production in resource-constrained environments. A production management model was designed by integrating Standardized Work and 5S to strengthen parameter control, workplace organization, and communication across shifts. The model was applied to the garment stamping process of a textile SME and validated through statistical testing and financial appraisal. Results revealed a reduction in defective garments of more than 26% relative to the baseline and an internal rate of return of 9.72%, confirming both operational and economic feasibility. The study enriched academic understanding and offered practical guidance. Future research should explore sustainability and cross-sector applications.