Calibrating the Control Engineer

When applied to a physical system, a control law needs to be "personalized". It must be adjusted from product to product, family to family. Everyone down the line knows this, from designer to calibrator, to anyone involved with the implementation. So where does the control engineer fit into this scenario? The American Heritage Dictionary doesn\´t define control engineer, but it does define calibrate: "To check, adjust, or determine by comparison with a standard (the graduations of a quantitative measuring instrument)." If this sounds to you like a typical feedback control loop, then you are on your way to being calibrated.