diff --git a/Concepts.md b/Concepts.md
index e097c74..48e99cb 100644
--- a/Concepts.md
+++ b/Concepts.md
@@ -45,7 +45,22 @@ A Supplier is a vendor / distributor where you can buy/order parts. Price inform
 ### Manufacturer
 A manufacturer represents the company that manufacturer / build various parts (not necessary sell them). If the manufacturer also sell the parts, you have to create a supplier for that.
 
+### Storelocation
+A storelocation represents a place where parts can be stored. This could be a box, a shelf or other things (like the SMD feeder of a machine or so).
 
+Storelocations are hierarchical to represent storelocations contained in each other. 
+An example tree could look like this:
+* Shelf 1
+   * Box 1
+   * Box 2
+      * Box shelf A1
+      * Box shelf A2
+      * Box shelf B1
+      * Box shelf B2
+* Shelf 2
+* Cupboard
+
+Storelocations should be defined down to the smallest possible location, to make finding the part again easy.
 
 ## Attachments
 ### Attachment