The present invention relates to methods and apparatus for measuring a relative utility for each of a plurality of goals which comprise a system objective. A user identifies desired optical transceiver operational features, each of which may be implemented using specific microcode. Each oxide film consists of an oxide film of the same type as the neighbouring oxide film, but the oxygen ratios in the compositions of neighbouring oxide films differ from each other. The method of adjusting timing of fuel injection further includes adjusting a pre-stroke of a plunger of a fuel injector assembly. Also disclosed are blades and cartridges made from the material, and methods and apparatus making and using the material.