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The 4 M’s +1 and Cause Effect Diagram

 

 

Man, Machine, Materials, Method + Management

The name for 4M’s come from the four initial letters of the words Man, Machine, Materials and Method. However one more has been added here to emphasize the importance of Management in the overall success of failure of a manufacturing unit, whatever this could be just a production line or an entire factory. If Management is not properly involved in the other four M’s and it is sufficiently aware of the process and the possible outcomes, the whole operation and even the problems solution process could yield only mediocre to poor results.

 

Management is fundamental in establishing the proper policies, leadership, clear guidelines, work discipline, effective solution methods plus the proper work culture. This problem solution method is fundamentally oriented to manufacturing but it can be adapted to be used in any other scenario.

 

The 4M’s +1 name has to due with the concept that all problems or quality issues are related in one way or other to these five elements.

 

In a process one or more of these M’s can goes wrong and produce a bad output or product, however many times the root cause can not be evident at glance and a cause effect diagram analysis, involving these elements could be necessary.

 

The Cause Effect Diagram Integrating The 4M’s +1

 

This figure represents the possible root causes of a hypothetical defective product in any company, please be aware that the root cause sequence can have many levels beyond the ones shown here in branches A and B

Cause Effect  or Fish Bone Diagram

MANAGEMENT

MAN

MATERIALS

MACHINE

METHOD

Lack of Supervision

Unclear Guidelines

Wrong Method

Low Quality Materials

Improper Materials

Lack of Training

Bad Habits

Out of calibration

Defective

Obsolete

Incomplete Instructions

Defective Product

Lowest Cost Materials

Lack of Incoming Inspection

A

B