In SAP SD (STO) has Six Stage that complete full Stock Transport Order .

STO PO Create

PT-Code: ME21N-Create Purchase Order

Delivery Document Create

VL10B-Purchase Orders Due For Delivery

Complete the PGI

VL02N-Change Outbound Delivery

Goods receive for receiving plant  

MIGO-Goods Movement

Open PO report

ME2L-Purchase Orders by Supplier

Stock in transit

MB5T-Stock in Transit CC