Solution : https://service.sap.com/sap/support/notes/97249 (SAP Service marketplace login required)
Key words : 
additional key words co01, predefined order lot size, order lot size, lot-size range, attached program correction, routing selection logic, routing selection, bom selection, executed automatically, master data
Related Notes : 
       
| 79620 | CO01: Finding routing without considering lot size |