diff --git a/src/calculation_time_constrains/service.py b/src/calculation_time_constrains/service.py
index 4297143..5353a54 100644
--- a/src/calculation_time_constrains/service.py
+++ b/src/calculation_time_constrains/service.py
@@ -1031,8 +1031,32 @@ class OptimumCostModel:
             except Exception as e:
                 raise  # Non-retryable errors
 
+    def _get_equipment_fr(
+        self,
+        location_tag: str,
+        token: str
+    ):
+        failure_rate_url = f"{self.api_base_url}/reliability/asset/failure-rate/{self.location_tag}"
+        try:
+            response = requests.get(
+                failure_rate_url,
+                headers={
+                    "Content-Type": "application/json",
+                    "Authorization": f"Bearer {token}",
+                },
+                timeout=10
+            )
+            response.raise_for_status()
+            result = response.json()
+        except (requests.RequestException, ValueError) as e:
+            raise Exception(f"Failed to fetch or parse mdt data: {e}")
+
+        fr = result["data"]["failure_rate"]
+
+        return fr
+
     def _calculate_costs_vectorized(self, reliabilities: Dict[datetime, float],
-                              preventive_cost: float, failure_replacement_cost: float) -> List[Dict]:
+                              preventive_cost: float, failure_replacement_cost: float, failure_rate) -> List[Dict]:
         valid_data = [(date, rel) for date, rel in reliabilities.items() if rel is not None]
         if not valid_data:
             return []
@@ -1064,7 +1088,7 @@ class OptimumCostModel:
 
         # Calculate costs according to the formula
         # Failure cost = (1-R(T)) × IDRu / ∫₀ᵀ R(t) dt
-        failure_costs = (failure_probs * failure_replacement_cost) / expected_operating_times
+        failure_costs = (failure_rate * failure_replacement_cost * expected_operating_times)
         # Preventive cost = R(T) × IDRp / ∫₀ᵀ R(t) dt
         preventive_costs = (reliability_values * preventive_cost) / expected_operating_times
 
@@ -1153,7 +1177,7 @@ class OptimumCostModel:
 
                 # Get pre-fetched reliability data
                 reliabilities = all_reliabilities.get(location_tag, {})
-
+                failure_rate = self._get_equipment_fr(location_tag, self.token)
 
 
                 if not reliabilities:
@@ -1165,6 +1189,7 @@ class OptimumCostModel:
                     reliabilities=reliabilities,
                     preventive_cost=preventive_cost_per_equipment,
                     failure_replacement_cost=cost_per_failure
+                    failute_rate=failure_rate
                 )
 
                 if not predicted_costs: