Didn't realize someone (Toyota) codified a technique like this. Inkling is a huge fan of spending the extra steps in root cause analysis of a problem. It's hard to argue when you wouldn't want to at least figure out what the root cause of a problem is, even if you decide to just treat a symptom.
Yet doing the necessary drilling into the problem to get to the root cause often gets neglected. Even happens to us. And we love asking an annoying set of questions about a problem.