Quality is: Giving the customer what he wants today,
at a price he is pleased to pay,
at a cost we can contain,
again, and again,and again,
and giving him something even better tomorrow.
Quality is: The degree of congruence between expectation and realization.
Or, to put this into plainer words:
The matching of what you wanted with what you got.
Expectation versus fulfilment.
Quality is: Invisible when it is good,
Impossible to ignore when it is bad.
An invisible input.
Quality is: NOT mathematical statistics.
Quality is: The application of simple statistical method.
Quality is: NOT status, grade or class.