There are tons of vocabularies related to this concept, such as strengthen, improve, or enhance, but I've never found one proper vocabulary for a scientific (or at least formal) usage with this meaning. Oftentimes I want to describe an act of making some systems perfect by removing their hidden flaws. I think strengthen is inappropriate as it sounds like building some sort of muscle power. improve and enhance are not what I wanted too, since they're too much general and they don't seem like implying the flaw-removal concept.
Edit: I've added some examples that I thought simple improve is not quite specific.
Our research goal: improving the Intel CPU Architecture.
As you see, there are many ways to improve it; by accelerating the speed, by reducing its power consumption, or by removing its security flaws. The verb that I'm finding now is what inherently signifies the third act.