The more progressive a firm's approach to quality assurance, the less that company will need to rely on:

The answer to this question is inspection.
If the company want to place the quality of their product into perfection,they had no other choice beside investing in a more in-depth inspection procedures.
Even though these procedures may cost company a lot more expense, the customer's loyalty toward company will msot likely to be stable.

Quackwatch.com an expert in medical communications, dr. barrett operates 23 web sites; co-edits consumer health digest (a free weekly electronic newsletter); and has been a peer-review panelist for several top medical journals. he has written thousands of articles and delivered more than 300 talks at colleges, universities, medical schools, and professional meetings. his 52 books include the health robbers: a close look at quackery in america and eight editions of the college textbook consumer health: a guide to intelligent decisions. one book he edited, vitamins and minerals: or harm? , by charles marshall, ph.d., won the american medical writers association award for best book of 1983 for the general public and became a special publication of consumer reports books. his other classics include dubious cancer treatment, published by the florida division of the american cancer society; health schemes, scams, and frauds, published by consumer reports books; the vitamin pushers: how the "health food" industry is selling america a bill of goods, published by prometheus books; and reader's guide to "alternative" health methods, published by the american medical association. from 2012 through 2016, he served as north american co-editor of the journal focus on alternative and complementary therapy (fact). his media appearances have included dateline, the today show, good morning america, abc prime time, donahue, cnn, national public radio, and more than 200 radio and television talk show interviews.