Solution : https://service.sap.com/sap/support/notes/168415 (SAP Service marketplace login required)
Key words : 
additional key words coid, order information system, relevant process orders, transactions coid, process orders, system behaves, order items, process material, selection screen, material numbers
Related Notes : 
       
| 449944 | Process materials in production planning | 
| 168311 | COID: Process material: Material number missing |