Forty-two percent of multi-unit orders arrived in multiple packages originating from a single distribution center. “In some instances, multiple shipments may be unavoidable for items that are bulky or that cannot be packed with other orders,” noted Gregory. “However, in many of the cases we observed, the splitting of shipments was indicative of broader systems and fulfillment design issues that allowed items that could have been packaged together to ship separately.”
This is a little surprising! However, from my point of view, there is good news as well: more for researchers like me to do to optimize the systems!