If you want to set up Planed Transfer Order, the system you recommended material to be prepared on the basis of the production plan and work orders in MS Dynamics AX 2009 you can read following help to do this.
simply create a buffer warehouse for production and make it as your default warehouse in BOM lines , based on that the buffer warehouse should be refilled from the RM MWH , and you can define it in item coverage setting which mean (if the RM1 is required in production order so it should be picked from the buffer warehouse and if the buffer warehouse have no balance so it should be refilled from MWH) so once you explode or run Master Scheduling the planned transfer order have to be created from MW to Buffer Warehouse
simply create a buffer warehouse for production and make it as your default warehouse in BOM lines , based on that the buffer warehouse should be refilled from the RM MWH , and you can define it in item coverage setting which mean (if the RM1 is required in production order so it should be picked from the buffer warehouse and if the buffer warehouse have no balance so it should be refilled from MWH) so once you explode or run Master Scheduling the planned transfer order have to be created from MW to Buffer Warehouse