Solution : https://service.sap.com/sap/support/notes/1142061 (SAP Service marketplace login required)
Key words : 
mm-pur lis statistics, mm-pur info structures, info structure s012, info structure s013, prerequisites program error, run reconstruction, transaction oli3, vendor evaluation, transaction oli3bw, incorrect values
Related Notes : 
       
| 1044799 | Negative score for S013-PWMT & S012-MABW | 
| 941300 | Negative values for quantity reliability | 
| 877786 | Valuated blocked stocks - movements 107 and 109 | 
| 865034 | |
| 647025 |