Tester tester kits will need to include a known good and a known bad reference cable for comparisons.
I like your "who watches the watchers" reference, but AI's reviewing AI work, and notably, people reviewing people work, are subject to the same problem!
The same principles that worked for auditors tracking risk compliance in the 2000's now work for humans tracking AI-output risk compliance in 2026
qui custodiet ipsos custodes?
for throughput, you can use a stopwatch and a big movie transfer from one end to another