diff -r af6a1f8a401c move.py
--- a/trytond/trytond/modules/stock/move.py	Thu Sep 08 15:52:00 2016 +0200
+++ b/trytond/trytond/modules/stock/move.py	Thu Sep 08 15:55:56 2016 +0200
@@ -238,6 +238,9 @@
     unit_price_required = fields.Function(
         fields.Boolean('Unit Price Required'),
         'on_change_with_unit_price_required')
+    assignation_required = fields.Function(
+        fields.Boolean('Assignation Required'),
+        'on_change_with_assignation_required')
 
     @classmethod
     def __setup__(cls):
@@ -299,6 +302,9 @@
                     },
                 'do': {
                     'invisible': ~Eval('state').in_(['draft', 'assigned']),
+                    'readonly': (Eval('shipment')
+                        | (Eval('assignation_required', True)
+                            & (Eval('state') == 'draft'))),
                     },
                 })
 
@@ -461,6 +467,11 @@
             return True
         return False
 
+    @fields.depends('from_location')
+    def on_change_with_assignation_required(self, name=None):
+        if self.from_location:
+            return self.from_location.type == 'storage'
+
     @staticmethod
     def _get_shipment():
         'Return list of Model names for shipment Reference'
diff -r af6a1f8a401c view/move_form.xml
--- a/trytond/trytond/modules/stock/view/move_form.xml	Thu Sep 08 15:52:00 2016 +0200
+++ b/trytond/trytond/modules/stock/view/move_form.xml	Thu Sep 08 15:55:56 2016 +0200
@@ -30,7 +30,9 @@
     <group col="20" colspan="2" id="buttons">
         <button name="cancel" string="Cancel" icon="tryton-cancel"/>
         <button name="draft" string="Reset to Draft" icon="tryton-clear"/>
+        <button name="do" string="Do" icon="tryton-go-next"/>
     </group>
     <field name="unit_price_required" invisible="1" colspan="4"/>
     <field name="unit_digits" invisible="1" colspan="4"/>
+    <field name="assignation_required" invisible="1" colspan="4"/>
 </form>
diff -r af6a1f8a401c view/move_tree.xml
--- a/trytond/trytond/modules/stock/view/move_tree.xml	Thu Sep 08 15:52:00 2016 +0200
+++ b/trytond/trytond/modules/stock/view/move_tree.xml	Thu Sep 08 15:55:56 2016 +0200
@@ -13,5 +13,7 @@
     <field name="state"/>
     <button name="cancel" string="Cancel"/>
     <button name="draft" string="Reset to Draft"/>
+    <button name="do" string="Do"/>
     <field name="unit_digits" tree_invisible="1"/>
+    <field name="assignation_required" tree_invisible="1"/>
 </tree>