In　an　agile　supply　chain,　delivery　delay　of　part　of　subtasks　often　causes　the　whole　order＇s　tardiness.　This　paper　studies　how　to　reduce　the　risk　of　order　tardiness　by　considering　probability　of　delivery　delay.　A　decision　model　based　on　delivery　credit　for　agile　supply　chain　scheduling　is　proposed.　The　model　can　satisfy　requirements　of　lean　production　and　adapt　the　conditions　which　information　is　incompletely　share.　Meanwhile,　a　heuristic　method　based　on　genetic　algorithm　is　designed　to　solve　the　model.　Numerical　experiments　are　conducted　to　evaluate　the　validity　of　the　model　and　its　algorithm　with　different　order　urgency,　order　tardiness　cost　and　supplier　delivery　credit.