A method for forming an elevated temperature durable coating on a surface of a substrate includes applying an aqueous slurry comprising lithium silicate, sodium silicate, potassium silicate, zirconia powder, a fibrous agent, and a magnetic powder to a surface of a substrate in one or more layers of substantially uniform thickness to form a coating. Each foot comprises a horizontal flange, an outer-edge fin, and transverse ribs, which define compartments on the flange surface. By selecting a number of adjacent passive device units extending in the first and second direction, and separating the selected units from the wafer along the corresponding scribe lines, a passive device chip having a desired electrical characteristic can be obtained. The at least one actual operating parameter is approximated to the setpoint default by changing the gear. The example also includes presenting a representation of the potential solution.