What is the highest number of skills needed to fix a part fault? | what  did  you want  to get  about the highest number of skills needed to fix a part fault | What is the name of the part that requires the most amount of skills to fix?
SELECT  T1.part_name FROM Parts AS T1 JOIN Part_Faults AS T2 ON T1.part_id   =   T2.part_id JOIN Skills_Required_To_Fix AS T3 ON T2.part_fault_id   =   T3.part_fault_id GROUP BY T1.part_id ORDER BY count ( * )  DESC LIMIT 1
highest number of skills needed refers to MAX(count(skills)); part that requires the most amount of skills to fix refers to part_name;