It collapses into Act-Utilitarianism.

act and rule utilitarianism.

what is the fundamental difference between act utilitarianism and ethical relativism? is a good and bad discussion about the true of life

Act Utilitarianism is a theory of ethics. Basically, you need to think of it as weighing the pros and cons. The needs of the many outweigh the needs of the few, and sometimes you might have to do something you don't really want to do in order to do the things you do want to do.