The next tool that we will look at is an Ishikawa diagram. You may also know this as a fishbone or cause-and-effect diagram.



The problem or undesired effect is placed on the right-hand side of a piece of paper. A straight line is then drawn to the left-hand side. Primary causes are branched off of that, and secondary causes are branched off of those. The purpose of this is to help you identify the real causes of the problem and then address them appropriately.