```
+---+
| 1 |
+---------------------+ |
| Leverantör | |
+---------------+ |
| |
+---+
|
V
+----------+
| Köp |
| Beställ |
+----------+
|
V
+-----------------------------------+
| Lagerhanteringssystem |
+-----------------------------------+
|
V
+------------------------+
| Produktkatalog |
+------------------------+
|
V
+-----------------------------------+
| Delsystem för lagerkontroll |
+-----------------------------------+
```
