The number assigned to the Work order.

Depressing this button allows the user to associate this work order with its parent work order.

Depressing this button allows the user to delete the parent work order association.

The Work Order number of the parent work order.

The number of the part to which the parent work order pertains. (Subordinate)

The Work Order number of the subordinate work order.

The number of the part to which the subordinate work order pertains.