Data preparation tools create dynamic and reproducible data flow diagrams at multiple scales, helping to reduce work times. In my case, I cut my time in half. This is a diagram that I generated with Tableau Prep in July 2020 to process data on historical deaths in Mexico, and the effect that COVID-19 has had on other causes of deaths. Data flow diagrams create a dynamic and easy-to-use experience that reduce worktime and encourage to reproducible research.