Indeed, this does go to show that even the best designed processes can be subject to unexpected failures.

I think it is fair to say that the Danish system is very good at identifying who should be voting, but perhaps needs a bit of work with the part that tells those people where to vote.

This highlights the fact that all information needs to be considered in the context of an end to end process and that quality can really only be determined if the desired outcome (in this case right voter, right place, right ballots) can be achieved.

I have earlier written about how problems with US and Irish voter registration could be solved by using the Danish citizen administration practice, where each citizen has one unique ID used for all citizen roles including election.

But what does it help when that unique identified person is misguided to the wrong or not existing polling station.

Having solved one data quality issue does not exclude other issues to either show up or become the talk of the town.