<![CDATA[The increase in textile waste due to the development of the fashion industry encourages the importance of utilizing leftover fabric as a production cost efficiency strategy to support the sustainability of MSMEs. This study aims to analyze the effect of leftover fabric utilization and production cost efficiency on business sustainability in Muslim fashion MSMEs from the perspective of female entrepreneurs in Bandung City. The study used a quantitative method with a descriptive and verification approach. The study population consisted of 30 female Muslim fashion MSMEs in Bandung City and the entire population was sampled using a saturated sampling technique. Data were collected through a Likert scale questionnaire supported by observation, interviews, and literature studies, then analyzed using descriptive analysis, classical assumption tests, multiple linear regression, t-tests, and F-tests. The results showed that the utilization of leftover fabric, production cost efficiency, and business sustainability were in the very high category. The utilization of leftover fabric had a positive and significant effect on business sustainability, as did production cost efficiency. Simultaneously, both variables also had a significant effect on business sustainability. This study concluded that optimizing the utilization of leftover fabric accompanied by the implementation of production cost efficiency is an important strategy to improve the sustainability of Muslim fashion MSMEs]]>
