The purpose of this paper is to show the impact of simulation software in the production processes. In particular, the study focused on the simulation techniques to model and to optimize the operations. It was carried out a review of different simulation software. Moreover, in this paper it was developed a case study on olive oil production system. In particular, in the case study, it was developed a simulation model that, starting from a scheduling of arrivals in real time, evaluates the performance of the system in order to optimize the parameters that can be chosen according to the requirements (yields optimization, quantity optimization, quality optimization, revenue maximization, etc.).