It is no doubt that the development of the business world has been progressive. Point of sale is one of the many system used as a means of payment in various existing businesses, especially in heterogeneous markets. The activity of transactions between Point of Sale Systems and Customers occur in the business world. Keep in mind also that one of the main factors of business success, is from customers. There is the need of an attractive strategy and certainly it will be to increase the income and assets of a business. To know that, this research will explore the behavior of customer which is based marketing, through RFM Method (Recency, Frequency and Monetary). The case of this study is in Goldfinger Store. It will do segmentation and also use data mining technique to do clustering by using K-Means with result of loyal and potential customer. The results of segmentation using RFM (Recency, Frequency, Monetary) and K-Means methods have produced multiple clusters by dividing them into groups.

Bank XYZ is one of the BPD Banks. One of the strategies is to reduce the amount of investment and improve the quality of services in terms of information technology. The performance of the Operational Information System at Bank XYZ in serving customers will determine the quality of the services it provides. In conducting this research, the author uses the COBIT 5 framework with a DSS domain that combines control standards from many different sources in a single framework that can enable management to make control and control of the Information System environment. Gap analysis is the current capability level with the expected level of capability. Thus it can be seen how far the reach that must be achieved until the organization's goals are achieved. The results of the assessment and evaluation of the conformity of standards and operational management in the information technology system at Bank XYZ with the COBIT 5 framework with the results of the assessment of Bank XYZ current capabilities are at level 4 a predictable process. The result of level 4 is to ensure that the implementation of the process can support organizational goals.