Let's talk about metrics for a second. Suppose you're in a war, and your metric for determining tactics is, how much of your opponent's forces you can destroy for the least cost. You drop an atomic bomb, and destroy huge numbers of your opposing forces at very low cost. Your metric says, you have succeeded. Then it's pointed out to you that you've also killed untold numbers of civilians, poisoned the survivors and land with radiation, and done harm to your reputation. But since the latter parameters weren't measured by your original metric, you can still claim that dropping the bomb was an overwhelming success. If your metrics only measure one effect, and don't measure other effects, then they're not complete.