Hi,
I would recommend you have a look at the (cross-plant) material status and its related Customizing. This should help you with your product life-cycle status management:
On top of that, you could leverage SAP PLM Web UI Status and Action Management for managing the status changes:
http://help.sap.com/erp2005_ehp_07/helpdata/en/f9/8ceb3db76a401bac4c456d718d0f46/frameset.htm
For additional governance, Engineering Change Management might be applied.
Regards, Ulf.