Elizabeth Holmes and her company "Theranos" had companies like...

Elizabeth Holmes and her company "Theranos" had companies like SHL, RHC, and all the hospital labs. horrified at the prospect that somebody had made a machine that could perform the same tests as well and as fast as the many machines in current use. It took a lot of investigation to show that she was a master "Hoaxster". Large investment companies and individuals (inc. Bill Clinton) spent many $millions trusting her. Problem was that samples that are sent out by testing agencies have to be tested regularly and results submitted by a certain time. In Aust. the RCPA (Royal College of Pathology ) has oversight here.
For example Abbott Diagnostics employs about 2000 Ph.D holders in many disciplines designing machines that do the enormous range of tests now available. The complexity of these machines has to be seen to be believed. Even more so compared with a jetliner or a racecar. No one person knows how to repair, test, and guarantee reliability of a large Biochemistry Analyser for example. Usually they replace sections of the machine at a time and cross their fingers that the machine will perform as expected.

The turtle neck sweaters, fake deep voice, and incredible bravado was eventually found out. Many $millions were lost and she and a few other geniuses went to jail.