The tasks performed throughout the day in a school canteen are now very focused on rush hour service, at lunchtime. Of all the tasks the most critical one is the screening of the trays used for processing the respective hygienization. This stage demands several employees to do the separation of waste and components to wash them and put them again into use at the beginning of the chain. The challenge was rethinking the delivery time of the elements, seeking to reduce the tasks performed inside the pantry.