When you examing a Lit Charcoal Kiln and it turns into a Finished Charcoal Kiln there is no message left in the log, and no dialog displayed on screen to alert you to that fact. I’d expect something like ‘The charcoal kiln has finished burning and is ready to disassemble.’
[EDIT] OK, take that back. Sometimes it works, but mostly it doesn’t? I had about 4 in a row with no notification then one where it did. I don’t know what the difference was.