Solution : https://service.sap.com/sap/support/notes/26891 (SAP Service marketplace login required)
Key words : 
additional key words aw01, company code > shortened fisc, individual depreciation calculation keys, shortened fiscal year, asset company codes, system administration guide, complete annual depreciation, depreciation calculation keys, company code, calculation keys
Related Notes : 
       
| 672255 | Shortened fiscal year/changing fiscal periods |