In the wine AOC system, the regulation of quantities performed by the professionalorganizations is aimed to smooth the variations of the quality of the wine due to thevariations in the climate that affect the quality of the grapes. Nevertheless, this regulationcould be damaging to the consumers due to the price increase resulting from the reduction ofthe quantities sold on the market. We propose a stochastic control model and a simulation toolable to measure the effects of this mechanism on the producer's profit and the consumer'ssurplus.