diff --git a/_static/accounting.css b/_static/accounting.css
index 8eb5e6298..a08136ab6 100644
--- a/_static/accounting.css
+++ b/_static/accounting.css
@@ -153,3 +153,17 @@ blockquote.highlights {
     margin-bottom: 0;
     text-align: center;
 }
+
+/*
+  lists of alternatives
+*/
+.alternatives-controls label {
+    display: block;
+}
+dl.alternatives > dt,
+dl.alternatives > dd {
+    display: none;
+}
+dl.alternatives > dd {
+    margin-left: 0;
+}
diff --git a/_static/misc.js b/_static/misc.js
index c3d559f9a..f139777ff 100644
--- a/_static/misc.js
+++ b/_static/misc.js
@@ -1,5 +1,52 @@
 (function () {
     document.addEventListener('DOMContentLoaded', function () {
+        alternatives()
+        checks_handling();
+    });
+
+    /** alternatives display:
+     *  - prepend control for each <dt>
+     *    - radio input with link to following dd
+     *    - label is <dt> content
+     *    - hide all first-level dt and dd (CSS)
+     *  - on change
+     *    - hide all dds
+     *    - show dd corresponding to the selected radio
+     *  - automatically select first control on startup
+     */
+    function alternatives() {
+        $('dl.alternatives').each(function (index) {
+            var $list = $(this),
+                $contents = $list.children('dd');
+            var $controls = $('<div class="alternatives-controls">').append(
+                $list.children('dt').map(function () {
+                    var label = document.createElement('label'),
+                        input = document.createElement('input');
+                    input.setAttribute('type', 'radio');
+                    input.setAttribute('name', 'alternatives-' + index);
+
+                    var sibling = this;
+                    while ((sibling = sibling.nextSibling) && sibling.nodeType !== 1);
+                    input.content = sibling;
+
+                    label.appendChild(input);
+                    label.appendChild(document.createTextNode(' '));
+                    label.appendChild(document.createTextNode(this.textContent));
+
+                    return label;
+                }))
+                .insertBefore($list)
+                .on('change', 'input', function (e) {
+                    // change event triggers only on newly selected input, not
+                    // on the one being deselected
+                    $contents.css('display', '');
+                    var content = e.target.content;
+                    content && (content.style.display = 'block');
+                })
+                .find('input:first').click();
+        });
+    }
+    function checks_handling() {
         var $section = $('.checks-handling');
         if (!$section.length) { return; }
 
@@ -9,7 +56,7 @@
                 while (this.firstChild) {
                     this.removeChild(this.firstChild)
                 }
-                
+
                 $('<label style="display: block;">')
                     .append('<input type="radio" name="checks-handling">')
                     .append(' ')
@@ -28,5 +75,6 @@
             }).eq(idx).prop('checked', true);
             $ul.nextAll('div').hide().eq(idx).show();
         }
-    });
+
+    }
 })();
diff --git a/double-entry.rst b/double-entry.rst
index 27b02ffe3..d6d76f5b4 100644
--- a/double-entry.rst
+++ b/double-entry.rst
@@ -17,13 +17,30 @@ Operations
 Stock moves represent the transit of goods and materials between inventory
 locations.
 
-* Manufacturing Order
-* Drop-shipping
-* Picking ➔ Packing ➔ Shipping
-* Inter-Warehouse transfert
-* Loss of product
-* Inventory
-* Reception
+.. rst-class:: alternatives force-right
+
+Manufacturing Order
+  Consume:
+    | 2 Wheels: Warehouse → Manufacturing
+    | 1 Bike Frame: Warehouse → Manufacturing
+  Produce:
+    1 Bicycle: Manufacturing → Warehouse
+  Configuration:
+    | Warehouse: the location the Manufacturing Order is initiated
+    | Manufacturing: on the product form, field “Manufacturing Location”
+
+Drop-shipping
+  stuff 1
+Picking ➔ Packing ➔ Shipping
+  stuff 2
+Inter-Warehouse transfert
+  stuff 3
+Loss of product
+  stuff 4
+Inventory
+  stuff 5
+Reception
+  stuff 6
 
 Analysis
 ========
@@ -41,17 +58,33 @@ For each inventory location, multiple data points can be analysed:
 * value of products delivered to clients over a period
 * value of products in transit between locations
 
-Procurements & Pull Rules
-=========================
+Procurements & Procurement Rules
+================================
 
 A procurement is a request for a specific quantity of products to a specific
 location. They can be created manually or automatically triggered by:
 
-* sale orders
-* minimum stock rules
-* rules
+.. rst-class:: alternatives force-right
 
-*Pull rules* describe how to fulfill procurements on specific locations:
+Sale order
+  Effect
+    A procurement is created at the customer location for every product
+    ordered by the customer (you have to deliver the customer)
+  Configuration
+    Procurement Location: on the customer, field “Customer Location” (property)
+Minimum Stock Rule
+  Effect
+    todo
+  Configuration
+    todo
+Rules
+  Effect
+    todo
+  Configuration
+    todo
+
+*Procurement rules* describe how to fulfill procurements on specific
+locations:
 
 * where the product should come from (source location)
 * whether the procurement is :abbr:`MTO (Made To Order)` or :abbr:`MTS (Made
@@ -64,30 +97,68 @@ location. They can be created manually or automatically triggered by:
 Routes
 ======
 
-At each step or a procurement's fulfillment, multiple rules may be
-available. *Routes* define which rules should be used based on the environment
-(product, sales orders, warehouse, …). To fulfill a procurement, the system
-will search for routes in the following order:
+Procurement rules are grouped in routes. Routes define paths the product must
+follow. Routes may be applicable or not, depending on the products, sales
+order lines, warehouse,...
 
-1. sale order line routes
-2. product routes
-3. product category routes
-4. warehouse routes
+To fulfill a procurement, the system will search for rules belonging to routes
+that are defined in (by order of priority):
+
+.. rst-class:: alternatives force-right
+
+Warehouses
+  Warehouse Route Example:
+    Pick → Pack → Ship
+  Picking List:
+    Pick Zone → Pack Zone
+  Pack List:
+    Pack Zone → Gate A
+  Delivery Order:
+    Gate A → Customer
+
+  Routes that describe how you organize your warehouse should be defined on the warehouse.
+A Product
+  Product Route Example:
+    Supplier → Quality Control → Inventory
+Product Category
+  Product Category Route Example:
+    Supplier → Cross-Docks → Pack Zone
+Sale Order Line
+  Sale Order Line Example: Drop-shipping
+    Supplier → Customer
 
 Push Rules
 ==========
 
-Push rules are triggered when a product enters a specific location, and allows
-chaining locations. Push rules can also be configured and filtered using
-routes.
 
-Some example:
-* quality control
-* transit warehouse 1
+Push rule are trigered when products arrive at a specific location and allows
+to automatically move them to another location. Push rules applications also
+depends on applicable routes.
 
-.. warning:: push rules and pull rules are *not* symmetrical, pull rules are
-             triggered by procurement requests whereas push rules are
-             triggered by stock moves
+.. rst-class:: alternatives force-right
+
+Quality Control
+  * Product lands in Arrival Zone
+  * Push 1: Arrival Zone → Quality Control
+  * Push 2: Quality Control → Inventry
+Transit Warehouse 1
+  * Product lands in ?
 
 Procurement Groups
 ==================
+
+Routes and rules defines the inventory moves. On every rule, the document type
+is provided:
+
+* Picking
+* Packing
+* Delivery Order
+* Purchase Order
+* ...
+
+Moves are grouped within the same document type if their procurement group and
+locations are the same.
+
+A sale order creates a procurement group so that pickings and delivery orders
+of the same order are grouped. But you can define specific groups on
+reordering rules too. (e.g. to group purchases of specific products together)