Deming speaks. The quality guru W. Edwards Deming (19001993) taught (among much else) that

(a) People work in the system. Management creates the system.

(b) Putting out fires is not improvement. Finding a point out of control, finding the special cause and removing it, is only putting the process back to where it was in the first place. It is not improvement of the process.

(c) Eliminate slogans, exhortations and targets for the workforce asking for zero defects and new levels of productivity.

(d) No one can guess the future loss of business from a dissatisfied customer. The cost to replace a defective item on the production line is fairly easy to estimate, but the cost of a defective item that goes out to a customer defies measure. Choose one of these sayings. 

Explain carefully what facts about improving quality the saying attempts to summarize.