@erik_squires
Interesting Thread...
I'd like to think that there is one additional metric that the food industry uses that I also hope the audio industry uses...especially the "little guys"..and that is safety.
I tend to think of quality assurance as consistency from batch to batch...but safety is all of the product design/testing done up front to make sure that the product won't hurt people. For audio, that means catch fire, shock people, suddenly play at insane volume levels, etc.
Finally, as for Harman type testing...no doubt that their spinorama data can get many people "into the park" at least as to what type of loudspeaker might sound good to them...notice I used a lot of qualifier words because with our hearing and sound preferences, there are a lot of variables.
Along those lines, let me mention just one...spinorama tends to point you in the direction of controlled directivity...BUT...if you have a really large room, there is a good chance that you will actually prefer speakers with more horizontal dispersion as it will likely add more ambiance and spatiousness...but as above, this is not a "guaranteed" will work for everyone.