noun
alternative plan; different proposal; separate idea
Used when presenting or considering a plan, idea, or suggestion that differs from the one currently under discussion. Common in business and formal contexts.
この案に反対なら、別案を出してください。
If you oppose this plan, please present an alternative.
会議では三つの別案が検討された。
Three alternative proposals were considered at the meeting.
Compound of 別 (different, separate) and 案 (plan, idea).