CAUSE AND EFFECT DIAGRAM

INVENTORDR. KAORU ISHIKAWA • The CE Diagram was invented

by Professor Kaoru Ishikawa of Tokyo University, a highly regarded Japanese expert in quality management.

• He first used it in 1943 to help explain to a group of engineers at Kawasaki Steel Works how a complex set of factors could be related to help understand a problem.

PURPOSE

• A cause and effect diagram examines whysomething happened or might happen byorganizing potential causes into smaller categories. It can also be useful for showing relationshipsbetween contributing factors. One of the Seven Basic Tools of Quality, it is often referred to as a fishbone diagram or Ishikawa diagram.

WHY DO WE CALL "FISHBONE" ?

• One of the reasons cause & effectdiagrams are also called fishbonediagrams is because the completeddiagram ends up looking like a fish'sskeleton with the fish head to theright of the diagram and the bonesbranching off behind it to the left.

CAUSE AND EFFECT DIAGRAM &

INDUSTRIES

• MANUFACTURING INDUSTRY – 6M

• SERVICE INDUSTRY – 4S

• MARKETING INDUSTRY – 7P

MANUFACTURING - 6M

SERVICE - 4S

MARKETING - 7P

HOW TO MAKE CAUSE ANDEFFECT DIAGRAM ? • Step 1: Identify the Problem

• Step 2: Work Out the MajorFactors Involved – Brainstorm

• Step 3: Identify Possible Causes

• Step 4: AnalyzeYour Diagram

STEP 1: IDENTİFY THE PROBLEM

First, write down the exact problem you face.

STEP 2: WORK OUT THE MAJORFACTORS INVOLVED – BRAİNSTORM

Next, identify the factorsthat may be part of theproblem.

STEP 3: IDENTİFY POSSİBLE CAUSES

Now, for each of thefactors you considered in step 2, brainstorm possiblecauses of the problem thatmay be related to thefactor.

STEP 4: ANALYZE YOUR DİAGRAM

Depending on the complexityand importance of theproblem, you can nowinvestigate the most likelycauses further. This mayinvolve setting upinvestigations, carrying outsurveys, and so on.

REFERENCES

• http://asq.org/learn-about-quality/cause-analysis-tools/overview/fishbone.html

• https://www.smartdraw.com/cause-and-effect/

• https://www.mindtools.com/pages/article/newTMC_03.htm

• https://whatis.techtarget.com/definition/fishbone-diagram

THANK YOU !

MERVE KURT 2013432050

ALPASLAN ÜNAL KÖSE 2013432052