You configured a stored key figure with an editability setting of "not editable.

In SAP IBP, a stored key figure with "not editable" status means users cannot manually edit it in planning views (e.g., Excel). However, values can still be updated via system processes, as per SAP IBP’s data management rules.

Option A: Importing the key figure data files using the Web UIThis is correct. Users can import data files (e.g., CSV) via the Data Integration app in the Web UI, overwriting "not editable" key figure values, a standard method, per SAP IBP’s import documentation.

Option B: Using the key figure calculations in the Web UIThis is incorrect. The Web UI (e.g., Planner Workspaces) doesn’t support direct key figure calculations; calculations are configured in the Planning Areas app or executed via jobs, not user-driven in the UI.

Option C: Using planning object maintenance with key figure data in Excel UIThis is correct. The Excel add-in’s "Manage Planning Objects" feature allows users to update key figure values for specific combinations, bypassing the "not editable" restriction, per SAP IBP’s Excel capabilities.

Option D: Managing the master data via the Web UIThis is incorrect. Master data management (e.g., via Manage Master Data app) updates attributes, not stored key figure values directly.

Thus, A and C are valid methods to modify "not editable" key figures, per SAP IBP’s officialfunctionality.