poka-yoke
TRANSCRIPT
Poka-Yoke
Poka-Yoke
Poka-yoke is a Japanese word pronounced as ("POH-kah YOH-kay")
“Poka” means “Mistakes”
&
“Yoke” means to “Avoid” Which means avoiding from mistakes or
mistake proofing.
DefinitionPoka-yoke is a quality assurance technique ,the
aim of poka-yoke is to eliminate defects in a
product by preventing or correcting mistakes as
early as possible. Poka-yoke has been used most
frequently in manufacturing environments.
History Poka-yoke concept was formalize and the term
adopted by Shigeo Shingo as part of the Toyota
Production System in 1960. It was originally
described as “baka-yoke”, but this name mean
“Fool-Proofing” so the name was changed to the
Poka-yoke.
Why???
The essential idea of poka-yoke is to design your process so
that mistakes are impossible or at least easily detected and
corrected so we can get ZDQ(zero defect quality) products.
The purpose of this technique to improve the process not
sort out defective parts of product.
Poka Yoke will help developers "do it right before deliver to
the customer".
GOAL Of Poka-Yoke
Principles of Poka-Yoke
Elimination:• Detect the design Defects. The objective is to
eliminate the possibility of errors.
EXAMPLE :The best example for this method is
the redesigning of the process or product so that
the task of Poka -Yoke is no longer necessary
Replacement:To improve reliability, simply substitute an
unpredictable process with a more reliable
process.
EXAMPLE : Use only piece of code about which
you are sure of its output. Replace the piece of
code about which you are uncertain of its output
results with approved code.
Prevention• Developers should design the product or process
so that it is impossible to make a mistake at all.
EXAMPLE : For example we put a “Mask” option
in an input form of any application to restrict user
to enter only specific value.
Facilitation:Developers should make product/software easier
to operate.
EXAMPLE :
DetectionIts objective is to detect the error before further
processing.
EXAMPLE : Software testing techniques are
used in Detection .Unit testing etc……………..
Mitigation:• The principle of attempting to decrease /minimize
the effects of errors.
EXAMPLE : If an application has multiple
components. If one of its component fails/crashes
during operation, its effects should not affect the
other components of application.
Benefits Of Poka-Yoke
The highest level of quality can be achieved
Enhanced Productivity
Lowers Quality Cost
Enhanced Customer Satisfaction
References
• http://www.encyclopedia.com/doc/1G23273100232.html
• http://www.qualitytimes.co.in/poke_yoke.htm
• http://www.mistakeproofing.com/software.html
• http://books.google.com.pk/books?id=hR_8Ulz6d_oC&prints
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