Dish Network Service Centers have quality control guys who go around all day long checking the work of the installers from their office. They compile reports complete with digital photos of the job and the signal strength on the set up screen.
I failed a QC when I did not put a bushing in the penetration through skirting on a mobile home. I did, however, integrate existing C-band service and a high def off air antenna together to make the customer happy. I am no longer a DNS installer.