田口质量损失函数中的质量损失不仅仅存在于不合格品中，同样也存在于合格品中。

In the Taguchi quality loss function, the loss exists not only in unqualified products, but also in qualified products.

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说明了在非对称的二次损失函数下，也可以采用田口玄一减小质量损失的思想：先进行稳健性设计减小波动，再进行灵敏度设计减小偏差。

It's proved that using the above asymmetric loss function, Taguchi's ideas of parameter design still works: first reduce the variance, and then reduce the bias.

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