Enormous loss of production time in machining, handling and assembly operations is caused mainly by resources’ unavailability. For this reason companies, both large and small, should optimize the production processes with the detection and elimination in advance of the majority of possible mistakes and disturbances that could cause deadlocks in the production process. The optimization tools which are available on the market are usually too expensive for smaller companies, which search for their competitive position in small quantity production. Therefore, a low cost simulation tool for the optimization of the resource present management is presented in this paper, where resources are treated as one of the main parameters in the production process and which could also enable smaller companies to optimize their production processes from the resource presence viewpoint.