Cause and Effect diagram devised by Professor Kaoru Ishikawis also known as Ishikawa diagram or Fishbone diagram. This diagram helps to categorize all possible causes of a specific problem, and identify the reason for a process not working out.
This is one of the great visual tools to use during brainstorming session to focus on the conversation and help the group to determine important causes with more detail. The diagram resembles the skeleton of a fish and hence the name ‘Fishbone diagram’ is given.
Why use Cause and Effect diagram?
· Easy to read format to draw out cause and effect relationships in an orderly manner.
· Recognizes areas of collecting information.
· Increase process knowledge.
· Group participation is encouraged to gather data.
Steps for constructing Cause and Effect diagram
· Identify the problem to be analyzed which is the head.
· Create a problem box displaying the problem and draw spine (draw horizontal arrow pointing to the right).
· Identify the main causes contributing to the problem. These causes are displayed as arrows to the spine similar to the bones of the fish.
· Sort out other causes influencing the problem (effect).
· Analyze the diagram to determine the root cause.
Hence, Cause and Effect diagram drives out all the causes of a problem using the 5 W’s (when, where, why, who, what) to provide an effective solution.Tags: BA