An aerospace part used to keep dirt and water out of a sensitive area of the end product. The part was expensive, complicated to build and had a long lead-time. From a design point of view, the part was a low priority item for a redesign effort. However, the complications it created for operations made it worthy of a study for improvement.
Part cost went from $4,000 to $200. Fastener count went from 57 to zero. Part numbers used was reduced from 10 to one, Suppliers went from nine to one.
During the workshop a design engineer was looking at the actual part. He said “in the 23 years I’ve designed products, I’ve never been told how much it costs to install a fastener. All I have to do is place a cross on the drawing where the fastener should go. And I’ve always figured the more the better.”