Surveys show that customers value service as much as they value quality.
Whoever treats them the best, gets their money. In clothing stores where there are only clerks, but not salespeople, customers are responsible for finding the merchandise they want and trying it on. When, however, they go to the dressing room, they often find the door locked. The customers must run around the store to find someone with a key, or they must activate a buzzer and hope that someone will see it and come to unlock the dressing room door. This also happens with restrooms.