A mounting machine determines whether or not there is running out of a component in a mounting process based on initial order information and the number of remaining components, and when the mounting machine determines that there is running out of a component, a modified order in which the determined component is preferentially mounted is set as the mounting order. In addition, during the mounting process when a component of a subsequent mounting target in the mounting order runs out, and a component later in the mounting order than the component does not run out, the component that does not run out is previously mounted on the board. Furthermore, the initial order which is indicated by the initial order information is set in advance as an order such that a component in the plurality of components that has a higher frequency of running out than another component is preferentially mounted.