The Taguchi quality philosophy
Five major points of the Taguchi quality philosophy are:
- In a competitive market environment, continual quality improvements and
cost reductions are necessary for business survival.
- An important measurement of the quality of a manufactured product is the
total loss generated by that product to the society.
- Change the pre-production experimental procedure from varying one factor
at a time to varying many factors simultaneously (DoE), so that quality can
be built into the product and the process.
- The customer’s loss due to poor quality is approximately proportional
to the square of the deviation of the performance characteristic from its
target or nominal value. Taguchi changes the objectives of the experiments
and the definition of quality from ‘achieving conformance to specifications’ to ‘achieving
the target and minimising the variability.
- A product performance variation can be reduced by examining the non-linear
effects of factors (parameters) on the performance characteristics. Any deviation
from a target leads to poor quality.
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