WB – Starting stock
PA – Planned order
BR – Process order
PP – Independant Requirements
VC – Customer order
VJ – Outbound Delivery
LA – Inbound Delivery
LE – Schedule line
UR – Inbound Transfer reservations
MR – Material Reservation (Outbound)
U1 – Outgoing STO
U2 – Outgoing STR
SB – Dependant Requirements
AR – Order reservation
BB – Subcontracting Requirements
BA – Purchase Requisitions
BE – Purchase Order