Database: machine_repair
Question: What are the names of the technicians by ascending order of quality rank for the machine they are assigned?
SQL:
SELECT T3.Name FROM repair_assignment AS T1 JOIN machine AS T2 ON T1.machine_id  =  T2.machine_id JOIN technician AS T3 ON T1.technician_ID  =  T3.technician_ID ORDER BY T2.quality_rank