The position of the fish tail in the fishbone diagram indicates the problem to be solved.

Mistake. The fishbone diagram was invented by Japanese management master Kaoru Ishikawa. This is a way to find the root of the problem. Write the questions on the head of the fishbone, group the same questions and mark them on the fishbone. Ask for your opinions according to different questions and sum up the correct reasons. So mark the problem to be solved on the head of the fishbone.