Hi Alison,
These all specify the different status changes for a Product.
PROD 1: New
PROD 2: Changed in Feeder System
PROD 3: Deleted in Feeder System
PROD 4: Processed in SAP GTS System
PROD 5: Entered in SAP GTS System
so, when we see a Product with the Status assigned as PROD 1 , then we can understood that the Product is New. if it having PROD 3 - it means that the Product Deleted in your ECC or any other Feeder System (the system from where the Material transferred to SAP GTS). so, each Status specifying the actual stage of the Product.
if you check in the Table : /SAPSLL/CORSTA the field QUAL_STA and POBJT will give the current status of the Product .
QUAL_STA POBJT
PROD 1 : New B1 - Product Master Header
hope you understood the process. if you still have any further clarifications please let me know.
Thanks,
Srinivas Yellampalli