OTS is really just a collection of pretty common-sense guidelines like don't have more than a certain percentage of inventory in backstock, don't have backstock of stuff that doesn't sell well, keep your backstock organized, etc.

There are a few details about it that can be irritating, but the comments from employees in the article are extremely misleading. If they're having a hard time passing their inspections it's because they're doing something very wrong - no one is failing an inspection for having 1 box facing the wrong way like it says in the article.