In this weeks release, the Planner Action Expedite Logic has been enhanced to modify how the Critical Safety Stock Level is applied.  Previously the Critical Safety Stock Level was considered only through the Lead Time, and as a result you could only use the Critical Safety Stock Level to reduce the generation of expedite messages within the item's Lead Time.  This enhancements extends the use of the Critical Safety Stock Level through the Firm Order Horizon, so now you can use the Critical Safety Stock Level to reduce the generation of expedite messages through the item's entire Firm Order Horizon.  See the documentation on the Safety Stock Options for more information on how the Critical Safety Stock Level is applied.