INTRODUCTION With the development of technology, especially in the field of information systems, the number of companies that depend on information systems has increased. However, some companies tend to build multiple autonomous systems for a specific task. These various systems were designed and built in an environment suited to their operational needs. The possibility of connecting one system to another is not taken into account in the design. Difficulties start to arise when companies want to integrate all the systems they have. This difficulty is caused by the fact that systems created in different environments cannot be easily integrated. Systems integration is an important requirement in a business or organization. However, this need will be quite difficult to achieve because as explained previously, the old system will be difficult to replace with a new system, because the system already has different business or organizational needs. When viewed from a business perspective, systems integration in a business or organization will impact business processes within the business or organization. The impact will also be felt in different parts of the company or organization. DISCUSSION The journal to be discussed below contains the understanding, importance, challenges and impact of systems integration. There is also a case study on a company operating in the financial sector that intends to implement 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... halfway through the paper... all members of the management were there to get more detailed integration requirements. Based on the interviews conducted, it is important that the EAI that will be used next is stable, secure, and does not disrupt business operations such as needing to shut down the system. The development team must also study and analyze the business process more deeply to look for possible weaknesses. After the business process has been studied, further weaknesses are discovered. When the customer has finished depositing the mortgage form, there are a series of manual processes that must be carried out by the company's employees. Data accumulation and duplication will occur when, for example, the affected employee is not working or is on holiday. This will lead to data inconsistencies in the system. Once the weaknesses of the business process are understood, the results constitute several criteria in the selection and development of the EAI.