This paper tries to introduce essential models of stochastic and deterministic models (DEA) using the Chance
Constrained Programming model to measure the DMU, that enter the system simultaneously with the stochastic inputs and outputs. Considering the fact that by adding a Decision Making Unit to the series of DMUs the efficiency frontier may change, the main goal is to change the available essential stochastic models of DEA and compute the amount of efficiency of the DMU and its position in respect to the old frontier.
Finally an Example is shown to highlight the procedure of changing the stochastic model to deterministic model
