Difference in MD04 and SAPAPO/RRP3

Hi Guru,

May i ask your help to get inputs and idea on how to check why there is a difference on Available requirement Date between ECC MD04 and APO SAPAPO/RRP3 on our system. Please help where we can check the cause for this.

Sample:

MD04 - MATABC

Req Date Prod Ord Qty Peg Req Lastest Req MRP Ele

16.11.2012 911111 1 211111 26.11.2012 OrdRes 21.11.2012 911112 1 211112 22.11.2012 OrdRes 21.11.2012 8000000 1 211112 DepReq 22.11.2012 911113 1 211112 23.11.2012 OrdRes 22.11.2012 911114 1 211113 22.11.2012 OrdRes 23.11.2012 911115 1 211111 03.12.2012 OrdRes 23.11.2012 911116 1 211111 03.12.2012 OrdRes 23.11.2012 911117 1 211112 26.11.2012 OrdRes 23.11.2012 911118 1 211112 26.11.2012 OrdRes 27.11.2012 8111111 1 211112 DepReq 29.11.2012 911119 1 211112 30.11.2012 OrdRes 29.11.2012 911120 1 211112 30.11.2012 OrdRes

SAPAPO/RRP3 - MATABC

Req Date Req Elem Qty Category

24.11.2012 911111 1 OrdRes (W) 21.11.2012 911112 1 OrdRes (W) 21.11.2012 8000000 1 DepDmd 24.11.2012 911113 1 OrdRes (W) 22.11.2012 911114 1 OrdRes (W) 01.12.2012 911115 1 OrdRes 01.12.2012 911116 1 OrdRes 25.11.2012 911117 1 OrdRes 25.11.2012 911118 1 OrdRes 27.11.2012 8111111 1 DepDmd 01.12.2012 911119 1 OrdRes 01.12.2012 911120 1 OrdRes