Causality diagram was invented by Japanese management master Kaoru Ishikawa, and its characteristics are concise, practical, in-depth and intuitive. It looks a bit like a fish bone, and problems or defects (that is, consequences) are marked on the "fish head". Fish bones grow on fish bones, and the possible causes of problems are listed according to the probability of occurrence, which helps to explain how the causes interact.

Extended data:

Key points of analysis:

1. When determining the major cause (big bones), the field operation generally starts with "people, machines, materials, laws and environment", and the management problems generally start with "people, things, time, place and things", which should be decided according to the specific situation.

When brainstorming, you should try to find out all possible reasons, not just what you can completely control or are implementing. People's reasons should be analyzed from the aspects of action rather than thinking and attitude.

3. If a reason can be attributed to two or more factors at the same time, please take the one with the strongest correlation as the standard (if necessary, consider the "three existentialism", that is, go to the scene to see the present things now, and find out the classification of the main factors with the strongest correlation through the comparison of relative conditions).