No-one asked for a general explanation.
The best term I have found, the one that seems to describe the way I evaluate situations the most accurately, is consequentialism. However, that may still be inaccurate. I don’t have a fully reliable way to determine what consequentialism entails; all I have is Wikipedia, at the moment.
I tend to just use cost-benefit analysis. I also have a mental, and quite arbitrary, scale of what things I do and don’t value, and to what degree, to avoid situations where I am presented with multiple, equally beneficial choices. I also have a few heuristics. One of them essentially says that given a choice between a loss that is spread out amongst many, and an equal loss divided amongst the few, the former is the more moral choice. Does that help?
At what point is utilitarianism not completely arbitrary?