The 4Ms Model to Name Ishikawa Main Causes

Cause and Effect Analysis
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researcher, Poland

The 4Ms Model to Name Ishikawa Main Causes

I checked the internet to find out who and when used the original 4Ms as names for the main cause categories (branches). Unfortunatelly I could not find it, even in papers referring to Ishikawa's book from 1982.
Maybe you know when and where this 4M first appeared?


Manager, India

This Technique is Referred as 4M Technique

the Fishbone is also referred to as the 4M model.
The 4 M's are as follows:
- Manpower
- Machinery
- Methods
- Materials
The origin is as not known very clearly but its appearance is understandable because when you're looking at a production system you usually find mistakes broadly in the above 4 categories, even if you proceed in detail you may find other causes. But you will notice also they tend to fall in either of the 4 categories. So we consider them as a base.
But with times people have modified it according to their convenience.

Jaap de Jonge
Editor, Netherlands

Variants of 4Ms Model

@ANUJ KUMAR SHRIVASTAVA: Excellent answer, remember 4M is just a template, a model that is easy to r... Sign up


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