To answer this question we’ll use the example of a company that is producing products that need to adhere to the CPSIA test requirements commonly required for toys and children’s products by the Consumer Product Safety Commission of the USA.
As you may know, this type of third-party lab testing is something you have to do (unless the manufacturer does it all themselves, which is quite unlikely) and it can get expensive quickly. So how do you choose how frequently to repeat the tests during ongoing production in order to assure compliance, but without doing it so often that the costs become too onerous?