diff --git a/src/calculation_time_constrains/flows.py b/src/calculation_time_constrains/flows.py
index 682b563..aeb8984 100644
--- a/src/calculation_time_constrains/flows.py
+++ b/src/calculation_time_constrains/flows.py
@@ -62,13 +62,14 @@ async def get_create_calculation_parameters(*, db_session: DbSession, calculatio
 
 
 async def create_calculation(*, db_session: DbSession, calculation_time_constrains_in: CalculationTimeConstrainsParametersCreate, created_by:str):
-    days = 365
+    days = 60
     ##
     calculation_data = await create_param_and_data(
         db_session=db_session, calculation_param_in=calculation_time_constrains_in, created_by=created_by)
 
     overhaul_cost_points = get_overhaul_cost_by_time_chart(
         calculation_time_constrains_in.overhaulCost, days)
+    
     corrective_cost_points, dailyNumberOfFailure = get_corrective_cost_time_chart(
         calculation_time_constrains_in.costPerFailure, days)
 
diff --git a/src/calculation_time_constrains/service.py b/src/calculation_time_constrains/service.py
index b143c89..ab90488 100644
--- a/src/calculation_time_constrains/service.py
+++ b/src/calculation_time_constrains/service.py
@@ -18,9 +18,9 @@ def get_corrective_cost_time_chart(cost_per_failure: float, days: int) -> list:
     day_points = np.arange(0, days)
 
     # Parameters for failure rate
-    base_rate = 1.2  # Base failure rate per day
-    acceleration = 7.2  # How quickly failure rate increases
-    grace_period = 50  # Days before failures start increasing significantly
+    base_rate = 5.4  # Base failure rate per day
+    acceleration = 11.2  # How quickly failure rate increases
+    grace_period = 15  # Days before failures start increasing significantly
 
     # Calculate daily failure rate using sigmoid function
     daily_failure_rate = base_rate / \