These tags have about a dozen questions each.
calculations and research are too general and ambiguous. A few questions tagged research do relate to hardware and software for academia, but even then there is ambiguity (and they're not great questions anyway).
malfunction might be ok, and it could be made a synonym of failure - but "failure" is a slightly different, stronger term.
(The criterion I used to spot these is: would anyone ever "favourite" this tag?)