I've heard some rather lengthy debates about tape measures. I don't know what it is about them.
Depending what semantics philosophy used, the tapes can't be adjusted, but they can be performance tested to assure they are within tolerance, which includes length, legibility and proper functionality of the end tab.
I must note that back in my third party days we received tape measures from some customers that were out of tolerance. I am a strong proponent of an initial verification, or at least accompanying certificate of calibration from a reputable manufacturer. There are "home handyman" brands, and there are professional brands. The easy selection is to save purchase money with a home handyman brand, then get an initial certification, or buy the good brand with an accompanying cert.
I will go on record that I have seen tape measures that do not meet their published specifications. I believe it was ISO10012 stated (if my memory serves correctly) "..the manufacturer's CLAIMED specifications..." (not actual quote, from my best memory).
Manufacturer's don't always make every product to spec. A good tape measure that initially meets specs will likely remain in spec until it is worn out.
A bottom line here is that the actual accuracy needs to be adequate for the intended use. If your product tolerance is +/- 1 inch, and the tape measure tolerance is +/-1/16th inch, you'll very likely never have difficulty. If, however your product tolerance is +/-1/8th inch with the same tape measure, consider a little more carefully how you maintain your tape measures. It's all about making sure the product you sell to your customer is what you claim it to be. Whether that means buying tape measures off the shelf with no maintenance other than throwing them away, or periodic verification against a standard ruler depends on %R&R, ratio between tape measure specs and your product tolerance. Let common sense and honesty "rule" (pun intended).