CALS has been a hot issue in the information-related industry in the world in order to achieve the competitive advantage of a firm or a nation. Nontheless, while there is an abundance of literature advocating the importance of introducing CALS, little attention has been given to the analysis of processes to be applied by CALS. This research conducts a case study on Firm H, investigating its processes for which CALS should be deployed and prioritizing these processes. Based on the analysis of the interviews with CALS experts who are familiar with the processes of Firm H, this paper concludes that CALS must be applied to the processes of the purchase/supply for Firm H, followed by such processes as the development of telephone exchangers, the operations management, and the service.