Earlier quoted context omitted.
Scantrons are a big improvement over electronic-only counting, but they can struggle with imperfectly-filled-in ballots... another good alternative, which avoids that particular problem, is to have a machine where you make your selections by button-press - but it prints them onto a physical card, lets you verify the printout through a window, then drops it into a built-in ballotbox. The machine itself can keep count,…
Or just some kind of simple mechanical stamping or cutting machine that assures that each vote is registered in the same way but in an easily understandable and transparent format.
Do you remember "hanging chads"?
But yeah, that's the crux of the idea: have a machine take the voter's choices, to effectively eliminate accidentally-spoiled ballots (the design of the "hanging chads" machines was sorely lacking on this point); but then have it produce a physical record, visually checked by the voter, to enable auditing & recounts.
Counting the hard copies would be the definitive source of truth, just like traditional paper ballots - any automated score-keeping would just be a bonus for early result reporting (although might also stand in for the manual count in "safe seats" where no-one cares to dispute the expected result).