Kaizen is a methodology for the continuous improvement of organizations, which implies incremental gradual improvements. KAI means change and ZEN means better. This research is the result of a case study developed in a chemical branch company located in northern Mexico. The problem presented in the case study is the long time caused by product changes. To achieve the improvement of the times, the current situation was first established through the use of Value Stream Mapping and SMED, subsequently, time and movements were taken to separate the phases of the work and the standardization of worksheets and time study was used, as well as the presentation of the updated SMED.