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Is Quality assured by Men or Machine?

B

bpugazhendhi

#1
With the increasing developments in design, engineering and technology, men working in industries feel that the quality is transferred to the machine from men. Men are there only to ensure that the machine works. When the machine works, quality is ensured by the machine without any intervention by men. There is very little role for the skill of men to produce unlike old times when quality depended on the skill of the tradesmen. Can quality be ensured only by machines?
 
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S

Sturmkind

#2
Re: Quality is assured by men or machine?

Yes -in precision / repeatable large run aerospace & automotive processes. Small pre-production runs are an entirely different issue, though and they do need skilled people running them.

The effort, skill, and creativity of the man is involved in the specifications, design, and implementation of the machine / Human - Machine Interface (PLC), and software / robotic programming. The human skill factors are crucial in the inevitable last 'tweaks' or compensation adjustments to the manufacturing system.

Your point that moment to moment manufacturing has removed most of the skilled tradesman is quite valid, but there is no replacement for said skilled tradesman's input on the planning and initial execution side of a manufacturing cell deployment.
 

bobdoering

Stop X-bar/R Madness!!
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#3
Re: Quality is assured by men or machine?

In some cases that may be true, but quality is still too complex for the sensors we have today to cover all facets. Only the simplest quality requirements can be solely delegated to machines. But, visual criteria, such as weld quality, surface imperfections, etc. still need human judgment. You may find examples of these issues handled mechanically, but either they have extraordinary cost justification, low requirements or people believing the machines are working when they really do not. Until cheap labor is difficult to find, people can still trump machines - it is an economics issue.

There are always improvements in the algorithms - and guess where they come from.
 
S

Sturmkind

#4
Re: Quality is assured by men or machine?

I believe you are quite correct, Bob. But the final product acceptance function is usually divorced from the actual production cell since lighting, boundary samples, destructive cut & etch weld tests and full dimensional verification are not generally immediately at the production cell.
 

bobdoering

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#5
Re: Quality is assured by men or machine?

I believe you are quite correct, Bob. But the final product acceptance function is usually divorced from the actual production cell since lighting, boundary samples, destructive cut & etch weld tests and full dimensional verification are not generally immediately at the production cell.
Sometimes final product acceptance function is distant from the cell is because the environment is not conducive by the production cell. But the goal should be that it really it should be in the cell to make process decisions faster, reduce unnecessary transportation of samples and minimize defects. But, it is all theoretical. The endpoint for any particular process is the economics and the management skill that supports it. We can not even claim it is "optimum" - because often when and where things are tested "just end up that way".
 

somashekar

Staff member
Super Moderator
#6
Re: Quality is assured by men or machine?

With the increasing developments in design, engineering and technology, men working in industries feel that the quality is transferred to the machine from men. Men are there only to ensure that the machine works. When the machine works, quality is ensured by the machine without any intervention by men. There is very little role for the skill of men to produce unlike old times when quality depended on the skill of the tradesmen. Can quality be ensured only by machines?
We all know what a straight line is. Try drawing one, a long one that runs from the top to bottom of an A4 sheet. Try drawing a few one besides another. I bet you will go seeking the simple rule or scale apart from your writing instrument.
That is man, and he made the scale (the machine) to get what he desired (the straight line)
Now who assured that all lines are of straight quality, the scale or the man ?
 
#7
Re: Quality is assured by men or machine?

With the increasing developments in design, engineering and technology, men working in industries feel that the quality is transferred to the machine from men.
The long and short of it is that very little will be produced if either man or machine is missing... Ergo: It takes both.

/Claes
 

Bev D

Heretical Statistician
Staff member
Super Moderator
#8
Re: Quality is assured by men or machine?

excellent!

Men make the machines, without us the machines don't exist.

"Skilled craftsmen" can't achieve the level of precision, reproducibility and quality that a properly designed automated machine (designed, runned and checked by man) can. and it's important to remember that men have been using machines LONG before computers came along.

There are many industries that have achieved far better quality (at a cheaper cost and more reliable delivery) with 'machines'.

The automation that creates cars is far more sophisticated than the cars.

The semiconductor industry couldn't create a simple 8080 processor without automation and now we have dimensions that are sub-micron...smart phones anyone?

And medical/biotech progress: Cancer is no longer a sure death sentence, heart failure can be mitigated, preemies can survive at smaller and smaller sizes...

NONE of this can be done by a skilled craftsman without machines of some type...and who wants to kill that mastodon by his bare hands for thanksgiving dinner anyway???
 

bobdoering

Stop X-bar/R Madness!!
Trusted Information Resource
#9
It is true - machines do things man can not do. But, the judgment of quality is never totally relegated to the machines - overall. Or....the scrap bins would dump themselves and we would not have hold areas.
 

Bev D

Heretical Statistician
Staff member
Super Moderator
#10
in some industries it is. (complicated electrical things such as semiconductors)

Others are getting closer. even in the precision machining industry, CMMs are often the inspector and the gauge.

If we have engineered specifications there is no reason that the machines can't do the inspection and accept/reject decision without post hoc intervention by the human. In my lifetime? probably not. but the first semiconductor was created and grew to the collosal microprocessors we have now in my lifetime - so far.
 
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