Problem Statement
The use of mobile phones during the time of work has affected the attention of supermarket attendants. Ideally, the prevailing state of social media and interactions enabled by mobile devices can distract these employees from relaying competitive services to clients (Charoensukmongkol, 2015). For the last one week, clients complained that they were not satisfied by the way attendants handled them when making inquiries. Furthermore, the CCTV cameras show that most of the attendants serving in the Nakumatt branch have been using their phones often and paying little attention to the clients during shopping. In this respect, it would be ...