A computer device implements a method of scheduling production of packaged dairy products in a production plant by simulation. The method obtains a production target for dairy products to be produced and packaged in the production plant, recipes for production of the packaged dairy products, where each recipe defines ingredients and recipe activities, and production unit data that specifies existing production units and available fluid paths in the production plant and associates the existing production units with unit activities and production capacities. The method further performs the simulation by generating, as a function of the recipes and the production unit data, time schedules of recipe activities performed at least partly by one or more combinations of the existing production units to achieve the production target data, and evaluating the time schedules for selection of at least one time schedule for the production plant.