Methods and systems for monitoring operating status of a device are provided. In the simplified mode, the consumer selects a first, non-temperature related special features button and inputs a cook time. The two enlarged annular flanges may be attached respectively to standard connectors so the hose can be readily attached to a standard outlet and sprinkling nozzle. N, values for F, y) are calculated using a system model M to determine y for a plurality of respective discrete values of u that are limited to and representatively sampling the range of possible values of u that are compatible with the predetermined system operational constraints, J being optimised by identifying the combination {u,u,.