Formfit de Colombia is a company that designs, produces and commercializes feminine articles of clothing such as: underwear, products of aesthetic control, and pijamas. The efficiencies presented in recent years are not expected or projected by the company due to the variety of product and the number of references must be diverse in modules manufacturing changes. To analyze the (maintenance, absenteeism, raw material and cutting), independent variables that affect this dependent variable hypothesis will proceed through the test to find the causes of the problem in terms of efficiency and Lean Manufacturing tool SMED, (fast change tool), proposal for improvement arose.