Necessary unit data indicative of the type and number of equipment units used in component mounting operation is obtained on the basis of production plan data, mounting data, and component library for each of production lots in advance. New allocation processing for allocating an equipment unit necessary for production execution of a new production lot to be newly produced on an electronic component mounting line for the new production lot on the basis of the necessary unit data is executed, and component reservation processing for registering the allocation result as the inventory data is conducted by a unit reservation unit.