diff --git a/src/blenderbim/blenderbim/bim/module/sequence/__init__.py b/src/blenderbim/blenderbim/bim/module/sequence/__init__.py
index 83777c9476..d311e356f8 100644
--- a/src/blenderbim/blenderbim/bim/module/sequence/__init__.py
+++ b/src/blenderbim/blenderbim/bim/module/sequence/__init__.py
@@ -9,6 +9,8 @@ classes = (
     operator.RemoveWorkPlan,
     operator.EnableEditingWorkPlan,
     operator.DisableEditingWorkPlan,
+    operator.EnableAggregatingWorkSchedule,
+    operator.AggregateWorkSchedule,
     operator.AddWorkSchedule,
     operator.EditWorkSchedule,
     operator.RemoveWorkSchedule,
diff --git a/src/blenderbim/blenderbim/bim/module/sequence/operator.py b/src/blenderbim/blenderbim/bim/module/sequence/operator.py
index 68e5659948..57e408bac9 100644
--- a/src/blenderbim/blenderbim/bim/module/sequence/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/sequence/operator.py
@@ -130,6 +130,28 @@ class DisableEditingWorkPlan(bpy.types.Operator):
         return {"FINISHED"}
 
 
+class EnableAggregatingWorkSchedule(bpy.types.Operator):
+    bl_idname = "bim.enable_aggregating_work_schedules"
+    bl_label = "Enable Assigning Work Schedules"
+
+    def execute(self, context):
+        props = context.scene.BIMWorkPlanProperties
+        props.aggregate_work_schedule = True
+        return {"FINISHED"}
+
+class AggregateWorkSchedule(bpy.types.Operator):
+    bl_idname = "bim.aggregate_work_schedule"
+    bl_label = "Enable Assigning Work Schedule"
+    work_schedule: bpy.props.IntProperty()
+
+    def execute(self, context):
+        ifcopenshell.api.run(
+            "aggregate.assign_object",
+            self.file,
+            **{"relating_object": self.file.by_id(props.active_work_plan_id), "product": self.file.by_id(self.work_schedule)},
+        )
+        Data.load(IfcStore.get_file())
+
 class AddWorkSchedule(bpy.types.Operator):
     bl_idname = "bim.add_work_schedule"
     bl_label = "Add Work Schedule"
diff --git a/src/blenderbim/blenderbim/bim/module/sequence/prop.py b/src/blenderbim/blenderbim/bim/module/sequence/prop.py
index c718d2a48f..4ec71209aa 100644
--- a/src/blenderbim/blenderbim/bim/module/sequence/prop.py
+++ b/src/blenderbim/blenderbim/bim/module/sequence/prop.py
@@ -106,6 +106,21 @@ def updateTaskTimeDateTime(self, context, startfinish):
     Data.load(IfcStore.get_file())
     setattr(self, startfinish, canonicalise_time(startfinish_datetime))
 
+workschedule_enum = []
+
+def getWorkSchedules(self, context):
+    global workschedule_enum
+    self.file = IfcStore.get_file()
+    if len(workschedule_enum) == 0 and IfcStore.get_schema():
+        workschedule_enum.clear()
+        workschedule_enum = [("")]
+        workschedule_enum.extend(
+            [
+                (s.id(), s.Name, "")
+                for s in self.file.by_type("IfcWorkSchedule")
+            ]
+        )
+    return workschedule_enum
 
 class Task(PropertyGroup):
     name: StringProperty(name="Name", update=updateTaskName)
@@ -132,7 +147,8 @@ class BIMWorkPlanProperties(PropertyGroup):
     work_plans: CollectionProperty(name="Work Plans", type=WorkPlan)
     active_work_plan_index: IntProperty(name="Active Work Plan Index")
     active_work_plan_id: IntProperty(name="Active Work Plan Id")
-
+    work_schedules: EnumProperty(items=getWorkSchedules, name="Quantity Types")
+    aggregate_work_schedule: BoolProperty(name="Is Aggregating WorkSchedule", default=False)
 
 class BIMWorkScheduleProperties(PropertyGroup):
     work_schedule_attributes: CollectionProperty(name="Work Schedule Attributes", type=Attribute)
diff --git a/src/blenderbim/blenderbim/bim/module/sequence/ui.py b/src/blenderbim/blenderbim/bim/module/sequence/ui.py
index e09e356ec1..1907eee951 100644
--- a/src/blenderbim/blenderbim/bim/module/sequence/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/sequence/ui.py
@@ -22,8 +22,10 @@ class BIM_PT_work_plans(Panel):
         row = self.layout.row(align=True)
         row.label(text="{} Work Plans Found".format(len(Data.work_plans)), icon="TEXT")
         if self.props.is_editing:
+
             row.operator("bim.add_work_plan", text="", icon="ADD")
             row.operator("bim.disable_work_plan_editing_ui", text="", icon="CHECKMARK")
+
         else:
             row.operator("bim.load_work_plans", text="", icon="GREASEPENCIL")
 
@@ -49,7 +51,14 @@ class BIM_PT_work_plans(Panel):
                 row.prop(attribute, "enum_value", text=attribute.name)
             if attribute.is_optional:
                 row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+        if self.props.aggregate_work_schedule:
+            self.draw_aggregating_work_schedule_ui()
 
+    def draw_aggregating_work_schedule_ui(self):
+        row = self.layout.row(align=True)
+        row.prop(self.props, "work_schedules", text="")
+        op = row.operator("bim.aggregate_work_schedule", text="", icon="ADD")
+        # op.work_schedule = self.props.work_schedules
 
 class BIM_UL_work_plans(UIList):
     def draw_item(self, context, layout, data, item, icon, active_data, active_propname):
@@ -57,6 +66,7 @@ class BIM_UL_work_plans(UIList):
             row = layout.row(align=True)
             row.label(text=item.name)
             if context.scene.BIMWorkPlanProperties.active_work_plan_id == item.ifc_definition_id:
+                row.operator("bim.enable_aggregating_work_schedules", text="", icon="LINENUMBERS_ON")
                 row.operator("bim.edit_work_plan", text="", icon="CHECKMARK")
                 row.operator("bim.disable_editing_work_plan", text="", icon="X")
             elif context.scene.BIMWorkPlanProperties.active_work_plan_id: