Migration definition
Migration is the movement of people across a specified boundary for the purpose of establishing a new or semi-permanent residence. External migration is where residence changes between a residential unit in the DSA and one outside it, and internal migration is where residence changes from one residential unit to another in the same DSA. 
Movement from one household to another household within the same compound, home or homestead is internal movement.  It is not classified as internal migration and it is treated separately from internal migration.