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Ishikawa
1. CAUSE AND EFFECT DIAGRAM
[ISHIKAWA]
BY:-
Lalit Mohan
Lalit Mohan (L)
2. WHAT IS IT?
ď An analysis tool that provides a systematic
way of looking at effects and their
respective causes
ď Developed by Dr. Kaoru Ishikawa of
Japan in 1943 and is sometimes referred
to as an Ishikawa Diagram or a Fishbone
Diagram because of its shape
3. Why implement this?
ď It helps determine the root causes of a
problem using a structured approach.
ď It encourages group participation and
utilizes group knowledge of the process.
ď It uses an orderly, easy-to-read format to
diagram cause-and-effect. relationships
ď It indicates possible causes of variation in
a process.
4. What does it do?
ď Enables team to focus on the content of
the problem , not on the history of the
problem.
ď Focus the team on cause not on
symptoms.
5. How to implement ?
ď Generate the cause needed to build a cause and
effect diagram,choose one method.
ď Brain storming
ď Check data sheets collected before meeting
ď Construct a cause and effect diagram
ď Place the problem statement in a box on right hand
side
ď Draw the root causes of process and connect it to
the back bone of fish bone.
ď Causes causes EFFECT
ď Causes causes
6. Major types of causes:-
ď Production process
ď Machines
ď Method
ď Material
ď People
ď Environment
Service process
ď Policies
ď Procedure
ď Plant
ď people
8. Analyze the diagram
⢠Look for causes that appear repeatedly.
These may represent root causes.
⢠Look for what you can measure in each cause
so you can quantify the effects of any
changes you make.
⢠Most importantly, identify and circle the
causes that you can take action on.