Harbour Headlines Hurt (or Help)
I don't think it's worth too much time commenting on the Harbour report, but check out these conflicting headlines! These are all from the same paper even (Detroit Free Press).
Hours per vehicle is a single metric that's too easily sub-optimized. You can farm out functions that get this metric down while increasing total cost. It's not strictly labor efficiency that matters, it's profits, cash flow, and the long-term strength of the company that matters. By “winning” hours per vehicle, you might be hurting all three of those key metrics.