diff --git a/app/helpers/service_helper.py b/app/helpers/service_helper.py
index e821a7d..14b2144 100644
--- a/app/helpers/service_helper.py
+++ b/app/helpers/service_helper.py
@@ -23,7 +23,11 @@ def items_csv_to_dict(items_csv_reader, solver_run):
               item[solver_run.get_constraint(col).reference_attribute.id] = row[key]
           elif solver_run.get_constraint(col):
             constraint = solver_run.get_constraint(col)
-            item['attributes'].append(constraint.reference_attribute)
+            item['attributes'].append({
+              'id': col,
+              'value': row[key],
+              'type': constraint.reference_attribute.type
+            })
           else:
             if row[key]:
               item[col] = row[key]
diff --git a/app/services/loft_service.py b/app/services/loft_service.py
index 02e1890..27ea599 100644
--- a/app/services/loft_service.py
+++ b/app/services/loft_service.py
@@ -87,15 +87,15 @@ class LoftService(Base):
       # multi-objective constraints
       for target in self.solver_run.objective_function.tif_targets:
         problem += lpSum([item.iif(self.solver_run, target.theta)*items[item.id]
-                         for item in self.solver_run.items]) >= target.value - 5, f'max tif theta ({target.theta}) target value {target.value}'
+                         for item in self.solver_run.items]) >= target.value - 8, f'max tif theta ({target.theta}) target value {target.value}'
         problem += lpSum([item.iif(self.solver_run, target.theta)*items[item.id]
-                         for item in self.solver_run.items]) <= target.value + 5, f'min tif theta ({target.theta}) target value {target.value}'
+                         for item in self.solver_run.items]) <= target.value + 8, f'min tif theta ({target.theta}) target value {target.value}'
 
       for target in self.solver_run.objective_function.tcc_targets:
         problem += lpSum([item.irf(self.solver_run, target.theta)*items[item.id]
-                         for item in self.solver_run.items]) >= target.value - 15, f'max tcc theta ({target.theta}) target value {target.value}'
+                         for item in self.solver_run.items]) >= target.value - 20, f'max tcc theta ({target.theta}) target value {target.value}'
         problem += lpSum([item.irf(self.solver_run, target.theta)*items[item.id]
-                         for item in self.solver_run.items]) <= target.value + 15, f'min tcc theta ({target.theta}) target value {target.value}'
+                         for item in self.solver_run.items]) <= target.value + 20, f'min tcc theta ({target.theta}) target value {target.value}'
 
       # solve problem
       problem.solve()