Fishbone diagram

Fishbone diagrams show the causes of a specific event

Fishbone diagram

2 HOURS - 4 HOURS

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TASKS

1. Prepare the six arms of the diagram on a whiteboard. 2. Define the problem clearly as a short statement in the head of the diagram. 3. Describe the causes of each bone and write them down at the end of each branch. Use the 4 Ms as categories: Machine, Man, Methods, Materials. 4. Minor causes are listed around the major causes. 5. Interpret the diagram once its finished.

RESOURCES

WHEN

To analyze possible problems that can help make design decissions.

WHY

This method allows to get a clear overview of causes and effects.

NOTE!

If there are branches that are too crowded, split them into different branches.

OUTPUT

A diagram showing causes and effects.

Next

Identify possibilities and opportunities for your design.

Reference

ISHIKAWA, Kaoru; ISHIKAWA, Kaoru. Guide to quality control. Tokyo: Asian Productivity Organization, 1982.
DALE, Barrie G.; VAN DER WIELE, Ton; VAN IWAARDEN, Jos. Managing quality. John Wiley & Sons, 2007.

Fishbone diagram

2 HOURS - 4 HOURS

Fishbone diagrams show the causes of a specific event

TASKS

1. Prepare the six arms of the diagram on a whiteboard. 2. Define the problem clearly as a short statement in the head of the diagram. 3. Describe the causes of each bone and write them down at the end of each branch. Use the 4 Ms as categories: Machine, Man, Methods, Materials. 4. Minor causes are listed around the major causes. 5. Interpret the diagram once its finished.

WHEN

To analyze possible problems that can help make design decissions.

WHY

This method allows to get a clear overview of causes and effects.

NOTE!

If there are branches that are too crowded, split them into different branches.

OUTPUT

A diagram showing causes and effects.

Next

Identify possibilities and opportunities for your design.

Reference

ISHIKAWA, Kaoru; ISHIKAWA, Kaoru. Guide to quality control. Tokyo: Asian Productivity Organization, 1982.
DALE, Barrie G.; VAN DER WIELE, Ton; VAN IWAARDEN, Jos. Managing quality. John Wiley & Sons, 2007.