There are some problems to use your test process:
1. Normally we test many assembly lots at the same time, not one by one. So we cannot stop at once if low yield occurred;
2. We feedback to you according to the total lot yield, not assembly lot yield. Then if few asseembly lot occurred low yield, but the total lot yield is >96%, it is unnecessary to inform you.
3. If stop testing at once when low yield occur, many products will be help up online and even delay of delivery.