I'm elaborating a small scorecard for a comparison between two technologies, I was wondering if it would be formally acceptable to use "and/or" in my bullet points, e.g., "Not automated and/or involves excessive configuration."
The construction "and/or" generally betrays a weak sentence construction. It's almost always possible to replace the use of "and/or" with a more satisfactory construction (such as "either . . . or" or "at least one of").
So while you are allowed to use it (unless your style manual tells you otherwise!), I think it's always better to avoid it in such writing. (One sign that it has not really gained widespread acceptance is the fact that most style manuals still tell you to eliminate "and/or" constructions entirely.)
Even if your advisers allow "and/or", it is best to write in good style.
In general, any phrasing that cannot be read aloud is bad style, because it will make the reader stumble.
Try "berries or apples or both" instead of "berries and/or apples". It is more legible.
This is also what Strunk and White recommend.
From a purely linguistic perspective, there is nothing wrong with and/or. Some languages do have dedicated conjunctions with this meaning ---e.g, German beziehungsweise, normally abbreviated to bzw in writing (and before you ask: yes, bzw appears in technical/formal writing too). Whether using and/or in a dissertation is ok from a stylistic perspect is a different matter. Strunk and White say it's not ok, but frankly, a substantial part of what Strunk and White say has little to no basis in reality.
Semi-ultimately, it is up to whether your advisor is ok with it, and really ultimately, it is up to how much you care about whether future readers of your dissertation will be ok with it.
I think that "or" means "and/or", but I might use the latter in rare cases where emphasis of the "and" possibility was called for.