INTRODUCTION Since the development of technology, especially in the field of information systems, the number of companies that depend on systems information has increased. However, some companies tend to create multiple standalone systems for a specific task. These different systems were designed and built in an environment adapted to the needs of their tasks. There is no consideration for the connection of one system to another in its design. Difficulties start to arise when companies want to integrate all the systems they have. This difficulty is due to the fact that systems created in different environments cannot be integrated easily. Systems integration is an important requirement in a business or organization. However, this need will be quite difficult to achieve because, as explained earlier, the old system will be difficult to replace with a new system because the system already meets various needs of the business or organization. From a business perspective, system integration in a business or organization will impact business processes within the business or organization. The impact will also be felt in several parts of the business or organization. DISCUSSION The journal which will be discussed below contains the understanding, importance, challenges and impact of system integration. There is also a case study of a company operating in the financial sector that is considering implementing integration between its systems. The company is called Fenton Financial Services (FFS). Initially, FFS only served customers offline. One day, FFS began to realize the rapid development... middle of paper ... all management members were for getting more detailed integration requirements. Based on the interviews conducted, it is important that the EAI that will be used later is stable, secure and does not disrupt business operations, such as the need to shut down the system. The development team should also study and analyze the business process in more depth to look for possible weaknesses. Once the business process is studied, other weaknesses are discovered. When the customer finishes submitting the mortgage form, a series of manual processes must be carried out by the company's employees. Accumulation and duplication of data will occur when, for example, the employee concerned is not working or is on leave. This will cause inconsistencies in system data. Once the weaknesses of the business process are understood, the results are several criteria in the selection and development of the EAI..