salary paid to the supervisor of an assembly line would normally be classified as
Workers on an assembly line are considered Direct Labor Indirect labor is not Direct labor as these workers do not actually make the product: Maintenance crews and supervisors are Indirect Labor.Indirect Labor is included in overhead and therefore is an indirect cost rather than a direct cost...ating Newest Oldest. Best Answer: The supervisor's salary is an indirect cost. Even if he helps out on the assembly line, he does not spend 100% of his time doing so. He has to go to meetings, etc.