An instance in which X significantly impacts Y but does not warrant changing X includes instances in which a manufacturer would have to compromise the integrity of their product for the sake of improving Y. For example, using copper wiring is significantly more costly to building a house than using aluminum wiring. However, the builder should not switch to aluminum because aluminum degrades significantly faster than copper and will demand more maintenance. Additionally, the interface of that aluminum with any non-aluminum wiring will create a voltage potential and possibly a fire hazard.