Service Order Linkup with purchase order

Hi Expets ,

At present we having purchase raw material with creation of purchase order and we have create the delivery cost (transportation) work order manually and we mentioned that delivery costs(Transportation) in same purchase order.

But our requirement is we need to create the service order for delivery cost and need to link up the raw material purchase order.

Kindly suggest ,any scenarios for above case .

Regards,

Suman Baina