I am not sure of the question.
At the start of a tool path, the tool goes to the first position from wherever it is. It could come from a machine home, or wherever the provious operation ended.
The first position is usually at a safe location away from the part. This is followed by traverse, approach, and engange moves to get the the start of the actual cutting portion of the path.
Mark Rief
Product Manager
Siemens PLM