A production management device, such as a production management computer, determines a production sequence of plural types of substrates in order to produce the substrates consecutively on a product type-by-type basis by using a component mounter including component supply devices. The production management device includes a main control unit for determining a production sequence of substrates such that, where a time from start to completion of off-line setup of all the component supply devices to be used for a single product type of substrate is defined as an off-line setup time, a sum of the off-line setup times for two product types of substrates to be consecutively produced is balanced over an entire period of consecutive production.