When TDS controls priorities- https://1.bp.blogspot.com/-KXMMkSKiUQc/W07VcmWUzBI/AAAAAAADDdc/cHdXQnc4aJszzGjuEO5pfXv9F8xMsJ14wCEwYBhgL/s640/MIGRATION%2B%25287%2529.jpg