Authorization Object: I_VORG_ORD
Authorization Field: BETRVORG
Authorization Field value: PMM7 (Terminate Order Assignment)
Authorization Object: I_VORG_ORD
Authorization Field: BETRVORG
Authorization Field value: PMM3 (Assign Order)
Create different roles & assign these details in PFCG. If you have limited exposure in PFCG, please discuss with Basis Consultants.