Field help (TRSCOD1) 

A stock transaction code is used to specify rules within a similar transaction type.

SEEINFOThese codes must be created in the miscellaneous table number 14.

The movement code is used to define specific stock receipt and issue rules for some transactions. For example, a dedicated transaction associated with experienced users can authorize the receipt to stock of goods in A status while the other users may be associated with a transaction authorizing the receipt to stock of goods in Q status.
SEEWARNINGThis will only be possible for product categories authorizing this type of receipt rules and having such a movement code (seeProduct category).