For the second time I had a Supervisor ride with me on Saturday. She first stated to "pretend I'm not even here." She was curious as to why I used the GPS device on my cellphone instead of mapping out the route. I first delivered 2 early AM stops then actually mapped out the route I would be taking. Keep in mind I deliver to 3 towns. All in all 24 stops, 2 OCA's and drove 84 miles. First stop was a Men's Wearhouse in a shopping mall, she was curious as to why I waited 15 minutes for someone to show up from the store. We were instructed a while back to not sheet deliveries for this store as closed or NI1 because it was a major prestigious account and they want the delivery made on the first attempt. She said this is contrary to the method. I was working as directed, yet going against the method. Also, what is wrong with using a GPS. If anything, it allows me to be more efficient and is no more distracting than using a map. I input the address and listen to the voice guided directions from my shirt pocket. Is there something wrong with this?