diff --git a/InvenTree/part/migrations/0022_auto_20190512_1246.py b/InvenTree/part/migrations/0022_auto_20190512_1246.py
new file mode 100644
index 0000000000..40f4d0dd4c
--- /dev/null
+++ b/InvenTree/part/migrations/0022_auto_20190512_1246.py
@@ -0,0 +1,31 @@
+# Generated by Django 2.2 on 2019-05-12 02:46
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('part', '0021_auto_20190510_2220'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='part',
+            name='bom_checked_by',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='boms_checked', to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AddField(
+            model_name='part',
+            name='bom_checked_date',
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='part',
+            name='bom_checksum',
+            field=models.CharField(blank=True, help_text='Stored BOM checksum', max_length=128),
+        ),
+    ]
diff --git a/InvenTree/part/models.py b/InvenTree/part/models.py
index 3c7cc22a32..12bcca2f04 100644
--- a/InvenTree/part/models.py
+++ b/InvenTree/part/models.py
@@ -301,23 +301,23 @@ class Part(models.Model):
 
     consumable = models.BooleanField(default=True, help_text='Can this part be used to build other parts?')
 
-    # Is this part "trackable"?
-    # Trackable parts can have unique instances
-    # which are assigned serial numbers (or batch numbers)
-    # and can have their movements tracked
     trackable = models.BooleanField(default=False, help_text='Does this part have tracking for unique items?')
 
-    # Is this part "purchaseable"?
     purchaseable = models.BooleanField(default=True, help_text='Can this part be purchased from external suppliers?')
 
-    # Can this part be sold to customers?
     salable = models.BooleanField(default=False, help_text="Can this part be sold to customers?")
 
-    # Is this part active?
     active = models.BooleanField(default=True, help_text='Is this part active?')
 
     notes = models.TextField(blank=True)
 
+    bom_checksum = models.CharField(max_length=128, blank=True, help_text='Stored BOM checksum')
+
+    bom_checked_by = models.ForeignKey(User, on_delete=models.SET_NULL, blank=True, null=True,
+                                       related_name='boms_checked')
+
+    bom_checked_date = models.DateField(blank=True, null=True)
+
     def format_barcode(self):
         """ Return a JSON string for formatting a barcode for this Part object """
 
@@ -493,7 +493,7 @@ class Part(models.Model):
         for item in self.bom_items.all():
             hash.update(str(item.sub_part.full_name).encode())
             hash.update(str(item.quantity).encode())
-            hash.update(str(item.notes).encode())
+            hash.update(str(item.note).encode())
 
         return str(hash.digest())