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When a company relies on an application that serves customers or employees while internal operations remain separate from it, there is a need to manually transfer data between the application and different systems, which consumes employee time and increases the possibility of errors and delays in executing orders.

Identifying the data sources that the application will rely on before starting programming helps to create a clear vision of how the information will reach the user and how it will be updated and managed throughout the project's operation.

When an application and its administration panel rely on unified data, every component within the system can work with the exact same information—eliminating the risk of having different versions that could lead to errors during daily operations.

When developing a new system for an existing application, the focus should not be placed entirely on design and new features; the data within the legacy system represents a crucial element of project continuity and cannot be treated merely as files to be transferred at the last minute.