Hi @최보훈_품질경영실_KBN , thanks for your question.
Would you be open to using a Jira business project? If so, you could use the Timeline https://support.atlassian.com/jira-work-management/docs/what-is-the-timeline-view-and-how-do-i-use-it/ , which is included.
Will that work for you?
Best wishes
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