diff --git a/src/aeros_simulation/model.py b/src/aeros_simulation/model.py
index 43821cf..51cf5fb 100644
--- a/src/aeros_simulation/model.py
+++ b/src/aeros_simulation/model.py
@@ -134,6 +134,7 @@ class AerosSimulationCalcResult(Base, DefaultMixin):
     contribution_factor = Column(Float, nullable=True)
     total_mo_downtime = Column(Float, nullable=True)
     total_po_downtime = Column(Float, nullable=True)
+    sof = Column(Float, nullable=True)
 
     aeros_simulation_id = Column(
         UUID(as_uuid=True), ForeignKey("rbd_tr_aeros_simulation.id"), nullable=False