A method can include selecting two control variables for a fluid production network; providing data acquired from the production network, the data associated with values for the two control variables; providing an interpolation model for interpolating the data over a domain defined by operational bounds for each of the two control variables; and solving a programming problem based at least in part on the interpolation model to provide values for at least one of the two control variables. Various other apparatuses, systems, methods, etc., are also disclosed.