one old story
Most of my jobs as technician, engineer, and later as a consultant have NOT been with communications companies.
(most were floppy- and hard-drive related, back when a hard drive was the size of a washing machine!)
But I did have one gig with X------x Radio, who's just 20 minutes away.
They wanted a computerized system to do quality control (QC) on production radios.
(think they came fully assembled from Japan)
They tuned up and sold a lot of commercial and marine radios in those days.
Engineering hired me to make the system, not Production.
Turned out, one guy was in charge of both production and quality.
And he had his own specs to determine if a radio shipped.
I took specifications off the data sheets and manuals.
There seemed to be some discrepency, and a whole lot of conflict-of-interest.
Needless to say , rejecting out-of-spec radios made me pretty unpopular there!
One of the few jobs where my Ham background really paid off!
That was 20 years ago, and no way represents current practices.