This tool will help you to spot, sort and display possible causes of a specific problem. The fishbone diagram illustrates the relationship between the outcome and the factors that influence it.
The problem is placed at the head of the fish, then major categories or process steps are placed at the end of the bones. Be flexible with the categories chosen. To identify causes under each category, review existing data and consider, ‘Why is this happening?’
Repeat this approach for each category until you drill down to the root cause.