The 4Ms Model to Name Ishikawa Main Causes

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Ćwiklicki, researcher, Poland
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? (...) Read more? Sign up for free

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  ANUJ KUMAR SHRIVASTAVA, 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

@: Excellent answer, remember 4M is just a templat (...)

 
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