I think 10 hours is a lot, but I would consider it if the position was really intriguing. Calibrating tests like this is pretty difficult though, anecdotally.

I think 10 hours is a lot, but I would consider it if the position was really intriguing. Calibrating tests like this is pretty difficult though, anecdotally. We give out a work sample test that we think should take 2-3 hours maximum and try to frame it that way in the problem description. Nonetheless, we have gotten a few in the past where it was clear that way more time was spent, and I feel bad when they don't make the cut. Tip - if you are giving out tests like this, ask for feedback from hires on how long they spent and then adjust accordingly. Anything you give out is probably way easier for you than the candidate.