diff --git a/app/helpers/solver_helper.py b/app/helpers/solver_helper.py
index f8a321e..6f03ae1 100644
--- a/app/helpers/solver_helper.py
+++ b/app/helpers/solver_helper.py
@@ -9,14 +9,15 @@ def build_constraints(solver_run, problem, items):
     min = constraint.minimum
     max = constraint.maximum
 
-    con = dict(zip([item.id for item in solver_run.items],
-                   [item.attribute_exists(attribute)
-                   for item in solver_run.items]))
-    problem += lpSum([con[item.id]
-                     * items[item.id]
-                     for item in solver_run.items]) >= round(total_form_items * (min / 100)), f'{attribute.id} - {attribute.value} - min'
-    problem += lpSum([con[item.id]
-                     * items[item.id]
-                     for item in solver_run.items]) <= round(total_form_items * (max / 100)), f'{attribute.id} - {attribute.value} - max'
+    if attribute.type == 'metadata':
+      con = dict(zip([item.id for item in solver_run.items],
+                    [item.attribute_exists(attribute)
+                    for item in solver_run.items]))
+      problem += lpSum([con[item.id]
+                      * items[item.id]
+                      for item in solver_run.items]) >= round(total_form_items * (min / 100)), f'{attribute.id} - {attribute.value} - min'
+      problem += lpSum([con[item.id]
+                      * items[item.id]
+                      for item in solver_run.items]) <= round(total_form_items * (max / 100)), f'{attribute.id} - {attribute.value} - max'
 
   return problem
diff --git a/app/main.py b/app/main.py
index 323dd5a..ae05cb2 100644
--- a/app/main.py
+++ b/app/main.py
@@ -19,9 +19,9 @@ class ServiceListener(SqsListener):
     logging.info('Process complete for %s', service.file_name)
 
 def main():
-  logging.info('Starting Solver Service (v1.0.1)...')
+  logging.info('Starting Solver Service (v1.1.0)...')
   listener = ServiceListener(
-    'measure-development-solver-ingest',
+    os.environ['SQS_QUEUE'],
     region_name=os.environ['AWS_REGION'],
     aws_access_key=os.environ['AWS_ACCESS_KEY_ID'],
     aws_secret_key=os.environ['AWS_SECRET_ACCESS_KEY'],
@@ -31,6 +31,6 @@ def main():
 
 if __name__ == '__main__':
   myname=os.path.basename(sys.argv[0])
-  pidfile='/tmp/%s' % myname       # any name
+  pidfile='/tmp/%s' % myname
   daemon = Daemonize(app=myname,pid=pidfile, action=main, foreground=True)
   daemon.start()
diff --git a/app/models/item.py b/app/models/item.py
index 9cb1d8d..78b6b14 100644
--- a/app/models/item.py
+++ b/app/models/item.py
@@ -1,5 +1,5 @@
 from pydantic import BaseModel
-from typing import List
+from typing import List, Optional
 
 from models.attribute import Attribute
 
@@ -8,6 +8,7 @@ from lib.irt.item_information_function import ItemInformationFunction
 
 class Item(BaseModel):
   id: int
+  passage: Optional[int]
   attributes: List[Attribute]
   b_param: float = 0.00
 
@@ -27,4 +28,4 @@ class Item(BaseModel):
     for attribute in self.attributes:
       if attribute.id == ref_attribute.id and attribute.value == ref_attribute.value:
         return True
-    return False
\ No newline at end of file
+    return False
diff --git a/app/models/solver_run.py b/app/models/solver_run.py
index e8c8543..b030548 100644
--- a/app/models/solver_run.py
+++ b/app/models/solver_run.py
@@ -27,3 +27,17 @@ class SolverRun(BaseModel):
   def remove_items(self, items):
     self.items = [item for item in self.items if item not in items]
     return True
+
+  def bundles(self, type_attribute):
+    bundles = []
+
+    for item in self.items:
+      attribute_id = getattr(item, type_attribute)()
+      bundle_index = next((index for (index, bundle) in enumerate(bundles) if bundle['id'] == attribute_id), None)
+
+      if bundle_index == None:
+        bundles.append({ 'id': item.passage, 'count': 1, 'type': type_attribute })
+      else:
+        bundles[bundle_index]['count'] += 1
+
+    return bundles