Solution : https://service.sap.com/sap/support/notes/684145 (SAP Service marketplace login required)
Key words :
longer reads planning data, delta determination correctly, attached program corrections, initial functional area, execute transaction 7ket, manual planned values, functional area, transaction 7ket, values planned, planned values
Related Notes :
394227 | KE1V: Deriving the functional area from the account |
376261 | 7KE1: Deriving functional areas from accounts |