diff --git a/src/pycram/failures.py b/src/pycram/failures.py
index 736adf8ee..562d7612e 100644
--- a/src/pycram/failures.py
+++ b/src/pycram/failures.py
@@ -20,6 +20,22 @@ def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
 
+class NoPlacePoseFoundCondition(PlanFailure):
+    """ Method or function has no return pose. """
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+
+class SensorMonitoringCondition(PlanFailure):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+
+class HumanNotFoundCondition(PlanFailure):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+
 class FailureDiagnosis(PlanFailure):
     """"""