Home Glossary Mockup Glossary Mockup By Deviation Check Editorial Team. Short answer A full-size sample assembly built to confirm appearance and workmanship before the real work proceeds. Submittals often reference an approved mockup as the standard for aesthetic deviations. Related terms Basis of design Browse the full glossary, the CSI division guides, or learn how submittal review works. Then run a review. View this page as Markdown for LLMs and note-taking.