diff --git a/hub/city_model_structure/life_cycle_assessment/building_component.py b/hub/city_model_structure/life_cycle_assessment/building_component.py
deleted file mode 100644
index d241977e..00000000
--- a/hub/city_model_structure/life_cycle_assessment/building_component.py
+++ /dev/null
@@ -1,33 +0,0 @@
-"""
-building_component module
-Returns the summarize of openings,
-envelopes and energy systems material emissions
-SPDX - License - Identifier: LGPL - 3.0 - or -later
-Copyright © 2024 Concordia CERC group
-Code contributors: Alireza Adli alireza.adli@concordia.ca
-Mohammad Reza Seyedabadi mohammad.seyedabadi@mail.concordia.ca
-"""
-
-
-class BuildingComponent:
-  def __init__(self, opening_emission,
-               envelope_emission, energy_systems_material_emission=0):
-    self._opening_emission = opening_emission
-    self._envelope_emission = envelope_emission
-    self._energy_systems_material_emission = energy_systems_material_emission
-
-  @property
-  def opening_emission(self):
-    return self._opening_emission
-
-  @property
-  def envelope_emission(self):
-    return self._envelope_emission
-
-  @property
-  def energy_systems_material_emission(self):
-    return self._energy_systems_material_emission
-
-  def component_emission(self):
-    return self._opening_emission + self._envelope_emission + \
-           self._energy_systems_material_emission
diff --git a/hub/city_model_structure/life_cycle_assessment/lca_end_of_life_carbon.py b/hub/city_model_structure/life_cycle_assessment/lca_end_of_life_carbon.py
index d6d2a439..f69114ed 100644
--- a/hub/city_model_structure/life_cycle_assessment/lca_end_of_life_carbon.py
+++ b/hub/city_model_structure/life_cycle_assessment/lca_end_of_life_carbon.py
@@ -1,5 +1,9 @@
 """
 lca_end_of_life_carbon module
+Machine emission of different methods can be a default argument, because,
+at this phase we use the average emission of different machines emission
+for each part (demolition, onsite, recycling and landfilling).
+For next phases, we can use a Machine object to find the corresponding emission.
 SPDX - License - Identifier: LGPL - 3.0
 Copyright © 2024 Concordia CERC group
 Project Developers: Alireza Adli alireza.adli@concordia.ca
@@ -7,5 +11,22 @@ Mohammad Reza Seyedabadi mohammad.seyedabadi@mail.concordia.ca
 """
 
 
-class EndOfLife:
-  pass
+class EndOfLifeEmission:
+  def __init__(self):
+    pass
+
+  def demolition(self, demolition_machine_emission, demolition_work_load):
+    pass
+
+  def onsite_recycling(self, onsite_machine_emission, onsite_work_load):
+    pass
+
+  def companies_recycling(self, companies_recycling_machine_emission,
+                          companies_recycling_work_load):
+    pass
+
+  def landfilling(self, landfilling_machine_emission, landfilling_work_load):
+    pass
+
+  def calculate_end_of_life_emission(self):
+    pass