While still in college, one my senior papers involved analysis of patterns of movement in a large local bar/nightclub. The owners had changed the layout of the club several times and were losing money every weekend. After spending time doing some simple observations, I made a few suggestions and after a two week period of implementation, they were making 8-10% more per weekend.

I'm always surprised when I see people who are convinced technology can solve their woes when all you need to do is make some observations. No wi-fi tracking will tell you there's a huge clearance rack blocking your view of several other items. It also won't tell you if a merchandise row is so narrow only one person can stand in front of a display.

Technology is great, but in most retail or commercial environment's, you still need feet on the ground.