glass pipeline
n.— «Becoming more open with schedules and plans with the carrier community is another way to deliver a more cost-effective transportation network, says Gustafson. “We call that the glass pipeline. The more we can see of what your production is going to be to satisfy the demands of your customer, and the more we can plan our resource allocation, the better off everybody’s going to be.”» —“A Brief Calm in the Metals Hauling Storm” by Dan Markham Metal Center News (Oak Brook, Illinois) June, 2007. (source: Double-Tongued Dictionary)