Excess waste problem is encountered by small and medium-sized companies in the textile and clothing sector, which has a negative impact on the profitability of these companies. Herein, a diagnosis analysis is performed in a small company using the Ishikawa diagram to identify the root causes and they are measured using indicators. Based on these results, a change management model is proposed, which supports the implementation of lean manufacturing tools and production system components during the 30-day pilot application. Then, each indicator is reassessed to verify the feasibility of the proposed umbrella model. Results show that this model reduced the amount of waste by 81.21%.