[ADD] inventory: How to process incoming receipts?

https://docs.google.com/document/d/1-9loB7sTjV2wHs7vHE4G4kRkxkS6_vW6jCUbtkZHwpg/edit#

inventory/barcode/operations/delivery.rst

@@ -1,3 +1,44 @@
 ===============================
 How to process delivery orders?
-===============================
+===============================
+
+There are two approaches to process delivery orders: you can either work
+on printed documents (and scan lines on the documents), or on a screen
+(and scan products directly).
+
+Process printed delivery orders:
+================================
+
+-   Print delivery orders of the day by selecting all documents from the
+    **To Do** list and print **Picking Operations** from the top menu.
+
+-   Once you start processing your delivery orders, **scan the barcode** on
+    the top-right corner of the document to load the right record on
+    the screen.
+
+-   Then, **scan the barcode** of every product, or scan the barcode of the
+    product on the picking line if the barcode on the product is not
+    easily accessible, visible or is missing.
+
+-   Once you scanned all products, scan the **Validate** barcode action to
+    finish the operation.
+
+.. image:: media/delivery01.png
+    :align: center
+
+Process delivery orders from a computer or mobile device:
+=========================================================
+
+-   Load all the delivery orders marked as **To Do**, and open the first
+    one.
+
+-   Pick up and scan each listed product.
+
+-   When you've picked all the items, click the **Validate** button or scan
+    the **Validate barcode** action to finish the Operation.
+
+-   Move to the next delivery order to process by clicking on the
+    top-right right **arrow** or scanning the **Pager-Next** barcode action.
+
+.. image:: media/delivery02.png
+    :align: center

inventory/barcode/operations/receipts.rst

@@ -1,3 +1,58 @@
 =================================
 How to process incoming receipts?
-=================================
+=================================
+
+There are two approaches to process incoming receipts: you can either
+work on printed documents (and scan lines on the documents), or on a
+screen (and scan products directly).
+
+Process printed incoming receipts:
+==================================
+
+-   Print incoming receipts of the day by selecting all documents from
+    the **To Receive** list and print **Picking Operations** from the top
+    menu.
+
+-   Once you start processing your incoming receipts, scan the barcode on
+    the top-right corner of the document to load the right record on
+    the screen.
+
+-   Then, scan the barcode of every product, or scan the barcode of the
+    product on the picking line if the barcode on the product is not
+    easily accessible, visible or is missing.
+
+-   Once you scanned all products, scan the **Validate** barcode action to
+    finish the operation.
+
+Process incoming receipts from a computer or mobile device:
+===========================================================
+
+-   Load all the incoming receipts marked as **To Receive**, and open the
+    first one.
+
+-   Pick up and scan each listed product.
+
+-   When you've picked all the items, click the **Validate** button or scan
+    the **Validate** barcode action to finish the Operation.
+
+-   Move to the next incoming receipt to process by clicking on the
+    top-right right **arrow** or scanning the **Pager-Next** barcode action.
+
+Example
+========
+
+Open operation interface.
+
+.. image:: media/receipts01.png
+    :align: center
+
+Scan.
+
+.. image:: media/receipts02.png
+    :align: center
+
+The picking appears. Scan items and/or fill in informations using the
+mouse and keyboard.
+
+.. image:: media/receipts03.png
+    :align: center