based on logistics systems simulation modeling that have been carried out, the actual logistics system packing house Katata farmer groups still has a lot of activity with uneven utility. these problems are mainly caused by lack of work station also work effectiveness of the packing house workers who handle the post-harvest process resulting products often have various problems. accordingly to the actual circumstances, improvement of packing house performance can be done by adding work stations and determine number of workers. the improvements made can have an impact on logistics costs incurred packing house Katata farmer groups. table of the comparison between the actual logistics expenses and proposed model can be sen in table 6 below