"The brake isn't reusable, so you have to have a spare lying around so your project doesn't get delayed." Is the false positive rate non-trivial? Because losin

"The brake isn't reusable, so you have to have a spare lying around so your project doesn't get delayed." Is the false positive rate non-trivial? Because losing a brake and saw only when otherwise someone would lose a finger seems like a great deal, even from a detached, purely economical perspective taking into account health care and disability costs.