I have a butter churn, and, from what I understand, its quality should be the average of the quality of the materials I've used. However I am unable to get better than quality 9 butter out of it, even though I'm using quality 10 milk and the churn is made of quality 10 wood. Maybe there's a skill factor involved, I'm not a carpenter; however this is not what bothers me.
What bothers me is that I can not tell the quality of my butter churn, and so I can not discern the source of the problem. Nor can I safely barter for a better butter churn, because all I have is the word of the person who constructed it.
It would be nice if the game had a feature which allowed the player to see the quality of constructions in addition to the current ability to see the quality of crafted items.
tldr; I can't tell what the quality of my butter churn is.