<p>A component mounting line operating method according to the present invention includes the following steps of: performing a plurality of optimization works for a component mounting line including multiple chip mounters; classifying and storing the result of the optimization works according to time; processing the result of the optimization works according to time by multiple indicators; selecting an index among the multiple indexes; arranging the stored result of the optimization works according to time based on the selected index; and displaying the arranged result of the optimization works according to time.</p>
