Change Routing

Hi All

Could you please let me know the method lsmw/ bapi/ idoc which can be used for changing the Routing for operation details.

T/code is CA02

Required fields are : QSEL1 - Requirements profile (LO)

QSEL2 - Job

QSEL3 - Position

QL_SEARCH - Qualification

Quick response is highly appreciat

Thanks

Sreeni