Low volume production

Hi everyone,

Would anyone be able to point me to some data on low volume production for assembled products? I’m interested in finding out statistics on how big this market is, in terms of how many products are made in relatively low volumes each year, and how much money is spent on these. By low volumes I mean anything below a few thousands or tens of thousands of units.

Aside from that, I’d be very interested in hearing some anecdotal experiences anyone has had manufacturing these sorts of volumes. In particular what works and what doesn’t, how it compares to higher volumes, and challenges in finding manufacturers and automation.

Thank you!