diff --git a/InvenTree/project/models.py b/InvenTree/project/models.py
index a46b641d39..2e228314ae 100644
--- a/InvenTree/project/models.py
+++ b/InvenTree/project/models.py
@@ -11,7 +11,7 @@ class ProjectCategory(InvenTreeTree):
     Each ProjectCategory can contain zero-or-more child categories,
     and in turn can have zero-or-one parent category.
     """
-    
+
     class Meta:
         verbose_name = "Project Category"
         verbose_name_plural = "Project Categories"
@@ -21,14 +21,14 @@ class Project(models.Model):
     """ A Project takes multiple Part objects.
     A project can output zero-or-more Part objects
     """
-    
+
     name = models.CharField(max_length=100)
     description = models.CharField(max_length=500, blank=True)
     category = models.ForeignKey(ProjectCategory, on_delete=models.CASCADE)
-    
+
     def __str__(self):
         return self.name
-        
+
     @property
     def projectParts(self):
         """ Return a list of all project parts associated with this project
@@ -41,23 +41,37 @@ class ProjectPart(models.Model):
     The quantity of parts required for a single-run of that project is stored.
     The overage is the number of extra parts that are generally used for a single run.
     """
-    
+
     # Overage types
     OVERAGE_PERCENT = 0
     OVERAGE_ABSOLUTE = 1
-    
+
     part = models.ForeignKey(Part, on_delete=models.CASCADE)
     project = models.ForeignKey(Project, on_delete=models.CASCADE)
-    quantity = models.IntegerField(default=1)
+    quantity = models.PositiveIntegerField(default=1)
     overage = models.FloatField(default=0)
-    overage_type = models.IntegerField(
+    overage_type = models.PositiveIntegerField(
         default=1,
         choices=[
             (OVERAGE_PERCENT, "Percent"),
             (OVERAGE_ABSOLUTE, "Absolute")
         ])
-    
+
     def __str__(self):
         return "{quan} x {name}".format(
             name=self.part.name,
             quan=self.quantity)
+
+class ProjectRun(models.Model):
+    """ A single run of a particular project.
+    Tracks the number of 'units' made in the project.
+    Provides functionality to update stock,
+    based on both:
+    a) Parts used (project inputs)
+    b) Parts produced (project outputs)
+    """
+
+    project = models.ForeignKey(Project, on_delete=models.CASCADE)
+    quantity = models.PositiveIntegerField(default=1)
+
+    run_date = models.DateField(auto_now_add=True)
diff --git a/InvenTree/supplier/models.py b/InvenTree/supplier/models.py
index db4f8a6659..968f2d011c 100644
--- a/InvenTree/supplier/models.py
+++ b/InvenTree/supplier/models.py
@@ -9,9 +9,9 @@ from part.models import Part
 class Supplier(Company):
     """ Represents a manufacturer or supplier
     """
-    
+
     pass
-    
+
 
 class Manufacturer(Company):
     """ Represents a manfufacturer
@@ -37,13 +37,18 @@ class SupplierPart(models.Model):
     supplier = models.ForeignKey(Supplier,
                                  on_delete=models.CASCADE)
     SKU = models.CharField(max_length=100)
-    
+
     manufacturer = models.ForeignKey(Manufacturer, blank=True, null=True, on_delete=models.CASCADE)
     MPN = models.CharField(max_length=100, blank=True)
-    
+
     URL = models.URLField(blank=True)
     description = models.CharField(max_length=250, blank=True)
 
+    single_price = models.DecimalField(max_digits=10, decimal_places=3)
+
+    # packaging that the part is supplied in, e.g. "Reel"
+    packaging = models.CharField(max_length=50, blank=True)
+
     def __str__(self):
         return "{mpn} - {supplier}".format(
             mpn=self.MPN,
@@ -58,7 +63,7 @@ class SupplierPriceBreak(models.Model):
 
     part = models.ForeignKey(SupplierPart,
                              on_delete=models.CASCADE)
-    quantity = models.IntegerField()
+    quantity = models.PositiveIntegerField()
     cost = models.DecimalField(max_digits=10, decimal_places=3)
     currency = models.CharField(max_length=10,
                                 blank=True)