First, make sure you customers can accept movement, especially for bulk buyers. If just for retail consumers, it is OK to do that.
Second, the FAI should have not just one parts. One is for the former line, the other is for the latter line.
Third, each of FAI should be passed functional test.
Fourth, keep evidence to trace back. Since PCBA lines have changed, unit quality data of each process should be keep record, including lot number.
Read More: MOKO is ISO 9001:2015 Certified
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