Hi Raja,
CO24 will display the Missing parts list
ME5A will display the Purchase Requsition details
ME2L will display the Purchase Order details
ME31L is for creating the schedule lines. Against schedule lin GR is posted. No PO.
ME33L to display the schedule lines and ME3M with scope of list as EINT
MB5B will display the closing stock
Thanks & Regards,
Ramagiri