A model simulating winery operation is proposed. Each elementary set o
f knowledge used in the model has been defined as an entity gathering
constant data, variable parameters and expert calculation functions. T
he model is structured hierachically. It has been implemented in objec
t-oriented programming and the language C++ has been chosen. This expe
rt simulation software produces dynamic balances of resources. For mor
e accuracy and efficiency, uncertain knowledge will have to be represe
nted in the simulator.