Data warehouse In its simplest definition, it is a repository where data related to data is queried and analysed. In the data warehouse, the data in the environment, which is called the operational system and which we will refer to as a source in our future articles, is copied with certain criteria or completely one-to-one and stored in an appropriate format. Since it is used to manage the workflows and to prepare the future road plans of the enterprises, the return exceeds the cost many times. Data Warehouse is a platform that provides easy access to information and fast and effective querying, as well as a business intelligence environment that allows easy, fast and accurate analysis of all data in a single center without any problems. Access to information is important for every business that has a customer today. Reaching the customer with the right information and analyzing the potential can be made possible with the raw data stored in the data warehouse. Finding new opportunities in the market, participating in competition, reducing business and product costs are the cornerstones of data warehouse architecture. Business mind : Business Intelligence is the name given to the processes and methods that enable us to process raw data and make it more meaningful and useful. Business Intelligence helps identify and develop new projects by processing large amounts of data. Why are companies investing in BI solutions? The shortest answer may be "to make more accurate and faster decisions"! In today's conditions, you must be fast, high quality and cheap at the same time. You must respond to your opponents' moves in a timely manner. Are you going to make a new campaign? Whether you are going to enter new markets or what kind of tactical decision you will make, you must be fast and effective without changing the conditions and environment. BI – business intelligence applications are exactly the solutions that meet this need. Business intelligence solutions offer companies the ability to analyze data more effectively by consolidating them on a common “intelligent” platform compared to existing intelligence and reporting systems. This capability allows us to see what's going on in our business processes and our customers at less cost, more accurately, more comprehensively, and most importantly, much faster. Business Intelligence has been used to identify cost reduction methods, uncover business opportunities, transform ERP data into accessible reports, respond quickly to retail demands, and optimize prices. In addition to making data accessible, BI software gives companies more power during deals by enabling them to more easily measure the value of the relationship with suppliers and customers. Of many data, only the necessary ones are filtered, unnecessary information is cleaned and transferred to the Nebim V3 Data Warehouse. Then, Business Intelligence dashboard reports are prepared over this data warehouse. With the increase in the number of decisions to be made per unit time, the need for Business Intelligence has also increased. The most basic feature of Business Intelligence solutions is that they bring great efficiency to businesses in the field of reporting and analysis. When Business Intelligence solutions are used, reports are prepared instantly with real-time data. Thus, much healthier results emerge in the analyzes. Business Intelligence applications mostly emerge when the reporting tools of the institutions are insufficient. While the application is being developed, reporting tools are also added, as time progresses, data increases and data is started to be obtained from different sources. In this case, reports are insufficient and business intelligence solutions are needed. On the other hand, Business Intelligence provides a solution at the point of making sense by associating data in corporate systems that receive data from different applications and databases.