People are conditioned to ...

People are conditioned to believe that error is inevitable.... However, we do not accept the same standard when it comes to our personal life. If we did, we would resign ourselves to being shortchanged now and then when we cash our paychecks. We would expect hospital nurses to drop a certain percentage of all newborn babies. We would expect to go home to the wrong house periodically. As individuals we do not tolerate these things. Thus we have a double standard, one for ourselves, one for the company.
 Phil Crosby

Quotes from the same author

Quality is such an attractive banner that sometimes we think we can get away with just waving it, without doing the hard work necessary to achieve it.
 Phil Crosby