[dmc]

Regarding the grocery stores... Layout changes from time to time, often in subtle ways such as (locally, this happened several months ago) the chilled juices being swapped with the chilled raw meats. They were back-to-back, in adjacent aisles. However, this would cause people to have to go searching for these relatively highly sought products.

This, in turn, would lead them past special offers and other 'impulse purchase' shelves. It keeps people in the store for longer, which may lead them to spend more money.

I don't believe it's in a grocery stores interests to get people in and out as soon as possible, so don't expect their cooperation ;)

[itmag]

Good point.

Maybe it could be a crowdsourced app then?