Abstract: The present invention relates to a method for optimizing a modeling of flows within a reservoir for optimization of oil/gas production, by receiving a first time step; receiving a flow condition for at least one well connected to the reservoir, selecting data in the control data that is applicable to the first time step; then determining at least one quality value based on the selected data. If a quality criterion is not met based on the quality value, determining a second time step within the first time step and reiterating step /c/ to /e/ with the second time step as the first time step. If the quality criterion is met based on the quality value, performing a modeling of flows within the reservoir based on said first time step.