actual logistics system simulation model that has been designed to produce data on the extent of the utility in the process of post-harvest handling at the packing house. after performing the simulation process in the actual circumstances, the next activity to be done is to design the development of simulation models of optimal logistics systems. development of various logistics systems model scenarios considered in order to determine the most optimum model that is able to be used as a recommendation to improve the logistics system at the packing house Katata farmer groups