ELDs will put supply chains in a vise. And maybe that’s a good thing.

For as long as I’ve covered both the trucking and logistics industries, they’ve functioned under a freight philosophy called “just-in-time” delivery or “JIT” for short.
Put simply, JIT is an inventory strategy companies employ to increase efficiency and decrease waste by receiving goods only as they are needed in the production process, thereby reducing inventory costs.
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Source:: http://fleetowner.com/blog/elds-will-put-supply-chains-vise-and-maybe-s-good-thing