Federal Reserve officials are cautiously nearing completion of a new plan for managing interest rates, concerned that some of the new tools they are likely to rely on could pose unintended risks in a crisis. The central bank has devoted extensive debate to the matter over the past two months and officials “have made a lot of progress” on a strategy to return monetary policy to a more normal footing after years of coping with crisis, Chicago Federal Reserve Bank President Charles Evans said on the sidelines of an economic conference here.