The problem observed in the warehouse of an auto parts company is the high picking process times due to the lack of standardization of the process itself. The objective of this research is to propose a management model to increase productivity in the order fulfillment process by means of Kaizen methodology techniques to reduce picking times and attend customer orders in the shortest possible time, for which the research is empirical with a quasi-experimental, post-positivist scope, under the case study modality. The difference in picking time depending on the type of worker in the warehouse was evidenced and through the standardization of the process a reduction in picking time of 41.37% was achieved in the case of new operators, 32.80% for a standard operator and 11.82% for old operators.