The analysis of cause and effect (Ishikawa diagram, or fish bone) What is Ishikawa diagram? The main objective analysis of cause and effect - to help the team solve the problem by finding the root causes so that you can take corrective action. The analysis of cause and effect - is drawing up of lines and words that represent the relationship between the result m its causes. This tool works well is called the Ishikawa diagram, or fish bone. How useful Ishikawa diagram? This method helps teams to better understand the problem and restore the gaps in their knowledge. Download Category Cause - Effect Keynote diagrams for your presentations.