# Stochastic optimization

SHOP is usually run as a deterministic model where all input attributes are known quantities. By adding several [](scenario) objects with a defined probability, it is possible to perform a stochastic optimization in SHOP. [Market](market) [price](market:sale_price) and [](reservoir) [inflow](reservoir:inflow) are the typical candidates for stochastic input data, where optimal dispatch decisions must be made based on the uncertain future price and/or inflow.