Which is a disservice.
Last week, we were grappling with a problem of inadequate supply of an intermediate component assembly. We should have had enough but ran out, severely affecting the supply of final product to a customer. Bad news. Drilling into the issue with the folks involved, it became clear we had missed on one element of our pull system. Basic stuff. But we lost track of it.
Gee, I thought we had passed that course. Felt we had conquered that city, slain that foe. I guess not. And why did we miss it for several weeks? Fundamentally, it was the wrong mental model in my own head. I didn't circle back quickly enough to the basic pattern which triggered the problem. I wanted to relentlessly move forward. Even though I have written here just last fall about linear vs. circular learning, I still was stuck in a linear mental model. Linearity runs deep.
Take a look if you are too linear today.