Why is the development of data warehouse a continuous cycle and a gradual development process?

This friend: 1. At present, there are many industries that can use data warehouse, but the key points can be summarized as follows: telecommunications, electricity, banking, securities, finance, insurance, government, taxation, manufacturing, hotel catering, retail, logistics, medical care and others. As far as the current situation is concerned, telecommunications, banking, securities, finance, insurance, these industries have been informationized earlier, so they basically have their own DW or BI. Electric power, government, taxation, manufacturing, hotel catering, retail, logistics and medical care are all just starting industries, or ERP has been well used and data has been accumulated, but BIDW is still in the process of development. Personally, it is a market-oriented industry. For government, tax and other enterprises, the installation and sales water is too deep. Moreover, I think the market with better development should be manufacturing and retail, while catering, hotels and medical care are scattered, so it is difficult to concentrate data. Secondly, the database can be divided into three levels, the first is the basic framework, the second is reports and statistics, and the last realm is analysis and mining. At present, I think most of them are in the presentation of reports and statistics of data. Of course, there are also analysis and mining projects, but these projects are very simple analysis and mining, and have not yet reached a high level. Analysis and mining actually need people who know business and technical algorithms to operate, rather than simply reading reports. For example, we often notice that an indicator has dropped compared with the same period, but you want to use a numerical thing to explain why it has dropped. Can you do it? How to find some key elements of these indicators, how to find the relationship elements of these indicators, etc., still needs us to ponder, rather than simply expressing them in several dimensions. Sometimes key elements, even those that are not directly related to these indicators, do exist. Third, great buildings come from masonry; Rich experience comes from bit by bit data accumulation. Therefore, the development of data warehouse is a process of continuous circulation and gradual development. Whether the above views are satisfactory is for reference only.