Impact of Standardization and Lean Six Sigma Methodologies on Waste Reduction: Evidence from Goldsmith Workshops in Guerrero, Mexico

Abstract

This study examines the impact of process standardization, administrative controls, and Lean Six Sigma methodologies on waste reduction in goldsmith workshops located in Guerrero, Mexico. Using an exploratory mixed-methods design, data were collected through structured interviews with managers and owners of 20 jewelry workshops in Taxco and Iguala. The analysis evaluated process documentation practices, administrative controls, critical production stages, and the implementation of continuous improvement methodologies in relation to reported material losses. Results indicate that workshops with documented procedures and structured management systems reported lower waste levels than those operating without formal controls. Acid treatment, sanding, and polishing were identified as the production stages most associated with material losses. Workshops implementing Manufacturing Excellence and Six Sigma achieved the lowest average waste rate (2.5%), compared with workshops using alternative methodologies or no formal methodology. The findings suggest that process standardization and Lean Six Sigma practices are associated with lower reported waste levels in artisanal jewelry workshops.