Which rule do NOT need to be considered when adding calculations to a key figure?

The statement regarding the need for calculations to be stored in persistent data storage is fundamentally important for understanding how calculations in SAP Integrated Business Planning (IBP) work. When adding calculations to a key figure, the calculations can be executed in real-time or during planning runs without necessarily requiring the results to be stored persistently. This flexibility allows users to perform necessary calculations dynamically, which is particularly useful for scenarios where storage space or data freshness is a concern.

On the other hand, considerations such as ensuring that aggregation calculations are based on a higher level, the requirement for a calculation chain to lead to a calculated key figure, and the necessity of having a defined input data structure are critical for ensuring the integrity and accuracy of the data and calculations within the IBP framework. These rules help maintain a coherent workflow and ensure the right data flows through the planning and forecasting processes, leading to meaningful outputs and effective business decisions. Thus, the need for persistent data storage is indeed not a required consideration in the context of adding calculations to a key figure.