Iwashita, Motoi; Tanimoto, Shigeaki - In: International Journal of Software Innovation (IJSI) 4 (2016) 2, pp. 1-16
Information and communication technology (ICT) including broadband networks, cloud computing, a variety of mobile devices, point-card systems, and “virtual coins” can induce complicated situations concerning customer management. In particular, billing management is very critical, and it is...