This paper presents the method of warehouse simulation model implementation using concepts of virtual reality. The basic idea is to compare the "Real process" controlled by operator with his/her heuristics with the "Virtual process" represented by simulation model, controlled by the optimization algorithm. Optimization algorithm is based on SD model of the warehouse and decision support module. The SD warehouse model represents the abstraction of "Virtual process" and is considered as a model of a model. The state of the "Virtual process" is controlled with help of decision support module and is compared with the state of Real process on the basis of actual information regarding the state of warehouse. This concept is useful for predictive model validation where the parallel observation of the actual system and virtual one takes place at the same time, and for the optimization algorithm migration into practice.