Which prerequisite must be met for key figure disaggregation?

The prerequisite for key figure disaggregation is that the key figure must be stored and editable in the current and future periods. This is essential because disaggregation involves taking a higher-level aggregated key figure and splitting it into finer, more detailed components. If the key figure is not editable, it cannot be adjusted or disaggregated based on the details of underlying data.

When a key figure is stored, it means that it has a value saved in the system, making it available for calculation and manipulation. Additionally, being editable both in the current and future time frames ensures that any disaggregation performed can be reflected in real-time or during future planning iterations. This flexibility is crucial for effective planning and forecasting processes in SAP IBP, allowing users to create more precise and accurate models based on detailed data inputs.

Other options imply restrictions on the usability or nature of the key figure, which would not support effective disaggregation. For instance, if a key figure is set to Not Editable, it cannot be manipulated, rendering disaggregation ineffective. Similarly, if it is calculated but subject to constraints that inhibit change, it does not meet the necessary criteria for successful disaggregation.