Comment by jacquesm

That, and you'd waste a ton of time because in such a re-run you'd be looking for a very limited number of parts from a much larger bin. So in the end you'd run around with bins rather than picking the parts from pre-sorted and binned by color and type parts. Either way it is a boatload of work.

The closest I've come to this is where you identify which sets are present in a batch by doing a trial on a sample (that's a pretty easy statistical job), and then sort directly into sets starting from the largest sets down. That way you reduce the parts count very rapidly. So, I did this for a bit and now have 18 60 liter crates of almost complete sets which all need to be manually completed and checked. Again, not profitable.

If you just want to do this to keep busy it is easy, if you want to make more than what you could make by flipping burgers it is surprisingly hard.