What's the supervisor skills should be considered on ?

To know the details of the work is supervised by in all its details, that giving you the ability to manage and lead a team work and avoid mistakes and solve problemsSecond, self-confidence is necessary in order workflow, fight idleness and especially in large workshops where they are dealing with different kinds of disciplines

Good planing,  Disiplin , time ,teem and material  management. Repot and recode to your management.