Solution : https://service.sap.com/sap/support/notes/172740 (SAP Service marketplace login required)
Key words : 
additional key words kedr, call function module 'kedr_indx_refresh', fully qualified itemized values, batch input method bear, transaction ke04/ke05/ke06, entries method = 'drule' stand, cross-transaction memory buffer, read derivation rule entries, derivation rule tables tkea2, derivation rule tables tkean
Related Notes : 
       
| 1654225 | Derivation of customer specific fields in table FCML_MAT | 
| 148609 | Char.deriv.:deriv.rule vals miss.aft.upgrade&trnsp. | 
| 74486 | INFO: Overview of consulting notes for CO-PA |