Final answer:
The statement is true; events must be recorded in the master data once to ensure accuracy and data integrity within business information systems.
Step-by-step explanation:
The statement that all events entered into a system must be reflected in the respective master data once and only once is true. In the context of database management and system design, this principle ensures the accuracy and integrity of the data within a system. It is closely related to the concept of normalization, which seeks to minimize redundancy and inconsistencies in data. When an event occurs, it should be accurately recorded in the relevant master data, but it should not be duplicated as this can lead to errors and discrepancies. This is part of the broader principles of data entry and management within the realm of enterprise resource planning (ERP) systems and other business information systems.
When events are entered into a system, they should be captured and recorded accurately in the respective master data. This ensures that the system remains consistent and reliable.For example, in a customer relationship management (CRM) system, any new customer information entered shouldbe automatically updated in the master data for customers, ensuring that the system has the most up-to-date and accurate information for effective business operations.