I work with industrial equipment and for us quality checks are part of the manufacturing process at every stage. You have to maintain a structured process to ensure a level of quality. It's quite rigid. To translate this process to vendor content creation (or a Certification process by others) it would mean the vendor (or Certifying body) would have to have a certain amount of self disipline and a systematic approach to content creation. All very boaring stuff that sucks the fun out of the job.

I made a couple of freebies and I used my runtime to see how others structured their content. It was quite a learning experience. But as I was making them I was always doing checks along the way. It just comes natural to me from my day job. Anyhoot I wanted want I made to work for myself too! And since the content had my name attached, it was also a bit of personal pride to get it right. But I didn't quite get it right the first time. LOL.