Solution : https://service.sap.com/sap/support/notes/174758 (SAP Service marketplace login required)
Key words : 
additional key words resetup, special update logic exists, 'x'                       target info structure, select                       initialize target version, select                      initialize target version, v003                       initialize target version, initialize target version, edit entire datasets, reorganization programs rmcvneua, heavy system load
Related Notes : 
       
| 1597096 | FAQ: Statistics update in Sales Information System | 
| 174583 | Variant configuration: Analysis | 
| 173756 | Collective note: SIS variant configuration |