Solution : https://service.sap.com/sap/support/notes/91179 (SAP Service marketplace login required)
Key words : 
additional key words, situation easily occurs, convert planned orders, generally planned orders, implement note package 82920, prerequisites component allocation, component allocation carried, planned orders, note package, planned order
Related Notes : 
       
| 82920 | Component allocation of phantom assemblies (BOM) | 
| 82838 | Component allocation of assemblies (prodctn order) | 
| 82644 | Component allocation of phantom assemblies (routing) | 
| 81656 | CO01: Component allocation in the collective order | 
| 73259 | CO01: Allocating components to an operation |