AMSA-180-1000 Author: John Frampton, Sam Gutmann, Julie Legate, and Charles Yang Title: Remarks on Derivation by Phase Citation: ms. 2000 Chomsky's Derivation by Phase (2000) introduces the idea of unvalued features. Feature checking and feature removal are replaced by feature valuation. The new system has several advantages. But there are problems involving the mechanisms of valuation and intervention which must be solved if the theory is to realize its promise. We attempt in this squib to make the problems clear and to offer some suggestions for solving them.