STO is avilable in SAP 3 ways like

1)STO plant to plant use mvt 351

2) STO with delivery use MVT 641 doc type-UB

3)ST) with delivery and billing use MVT type 643 doc type-

NB

configuration steps

1) CREATE CUSTOMER

2) CREATE VENDOR

3)MAINATAIN CUSTERMER AND VENDOR

4) MAINTAIN SALES AREA IN SUPP PLANT

5)MAINTAIN DEL TYPE AND CHECKING RULES

6)MAINTAIN SALES VIEW IN MMR