| ```
+---+
| 1 |
+---------------+ |
| Leverancier | |
+---------------+ |
| |
+---+
|
V
+----------+
| Aankoop |
| Bestel |
+----------+
|
V
+---------------------------+
| Voorraadbeheersysteem |
+---------------------------+
|
V
+------------------+
| Productcatalogus |
+------------------+
|
V
+---------------------------+
| Subsysteem voorraadbeheer |
+---------------------------+
``` |
