The second example I have that demonstrates why Instocks is so screwed up in my store, and most likely in other stores: For a long time, I was under the impression that EXF was only to be used for non-planogram ends and the check lanes, which is all true. Except, I had misunderstood the "check lanes" part of that to mean "only the end caps". As it turns out, EXF is perfectly acceptable to use on the check lane candy. A week before I had this epiphany, I had argued with my STL about how we shouldn't use EXF on the check lane candy because it would have dire consequences on the accumulator.
After I learned of my mistake, I decided I would talk to him about it, admit my mistake, make the change going forward, and hopefully that would open up a productive dialogue as to how we could fix some other things with Instocks, specifically overuse of EXF. During my conversation with him, I explained how bad data being given to the accumulator can add excessive work to many different workcenters. His response was, "Well, "in theory" (he actually did use air quotes) that's what they say will happen. But I've found that the accumulator only really has a negative effect on maybe 2% of the product in the store, which is really minor. The other 98% of the product here isn't really going to be impacted. So EXF isn't really that bad"
Meanwhile, I'm thinking, "Oh really?! You've found all that out while sitting in your office, all day everyday? I've never even seen you log into a PDA, let alone work a pull, pull something from the backroom, scan something on Instocks, set a POG, nothing!"
The bottom line is, when the person who is in charge of the entire store doesn't know how one process impacts another, specifically Instocks, and simply uses anecdotal evidence to make a judgement call, there really is no hope for that process to run efficiently.