Solution : https://service.sap.com/sap/support/notes/518906 (SAP Service marketplace login required)
Key words : 
batch class subsequently solution create report zvbqchar, transaction se38 ---> program zvbqchar ---> createfill, symptom standard characteristics lobm_qscore, usage decision exist, usage decision reason, attached correction instructions, terms lobm_qscore, assignment characteristics, inspection lots, manual deletion
Related Notes : 
       
| 517475 | Incorrect classification of class characteristics in QM | 
| 78235 | Revaluating ref. characterstcs in batch classifictn |