Home Glossary Change order Glossary Change order By Deviation Check Editorial Team. Short answer A written, signed amendment to the contract that adjusts scope, price, or schedule. Deviations caught late, after a product is fabricated or installed, are a frequent cause of change orders. Related terms DeviationRFI 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.