https://www.cnet.com/news/union-raises-concerns-amazons-new-one-day-prime-delivery-plans/

"With two-day Prime shipping, Amazon fulfillment workers currently face speeds of 200-300 orders per hour in 12-hour shifts. They struggle already to maintain that pace," RWDSU president Stuart Appelbaum said in a statement.

Amazon didn't immediately respond to a request for comment.