diff --git a/addons/stock/product.py b/addons/stock/product.py
index 5341e80fb09..cc2311b48f6 100644
--- a/addons/stock/product.py
+++ b/addons/stock/product.py
@@ -327,11 +327,64 @@ class product_product(osv.osv):
         return res
 
     _columns = {
-        'qty_available': fields.function(_product_available, type='float', string='Quantity On Hand', help="Current quantities of products in selected locations or all internal if none have been selected.", multi='qty_available', digits_compute=dp.get_precision('Product UoM')),
-        'virtual_available': fields.function(_product_available, type='float', string='Quantity Available', help="Forcasted quantity (computed as Quantity On Hand - Outgoing + Incoming) in selected locations or all internal if none have been selected.", multi='qty_available', digits_compute=dp.get_precision('Product UoM')),
-        'incoming_qty': fields.function(_product_available, type='float', string='Incoming', help="Quantities of products that are planned to arrive in selected locations or all internal if none have been selected.", multi='qty_available', digits_compute=dp.get_precision('Product UoM')),
-        'outgoing_qty': fields.function(_product_available, type='float', string='Outgoing', help="Quantities of products that are planned to leave in selected locations or all internal if none have been selected.", multi='qty_available', digits_compute=dp.get_precision('Product UoM')),
-        'track_production': fields.boolean('Track Manufacturing Lots' , help="Forces to specify a Production Lot for all moves containing this product and generated by a Manufacturing Order"),
+        'qty_available': fields.function(_product_available, multi='qty_available',
+            type='float',  digits_compute=dp.get_precision('Product UoM'),
+            string='Quantity On Hand',
+            help="Current quantity of products.\n"
+                 "In a context with a single Stock Location, this includes "
+                 "goods stored at this Location, or any of its children.\n"
+                 "In a context with a single Warehouse, this includes "
+                 "goods stored in the Stock Location of this Warehouse, or any "
+                 "of its children.\n"
+                 "In a context with a single Shop, this includes goods "
+                 "stored in the Stock Location of the Warehouse of this Shop, "
+                 "or any of its children.\n"
+                 "Otherwise, this includes goods stored in any Stock Location "
+                 "typed as 'internal'."),
+        'virtual_available': fields.function(_product_available, multi='qty_available',
+            type='float',  digits_compute=dp.get_precision('Product UoM'),
+            string='Quantity Available',
+            help="Forcasted quantity (computed as Quantity On Hand "
+                 "- Outgoing + Incoming)\n"
+                 "In a context with a single Stock Location, this includes "
+                 "goods stored at this Location, or any of its children.\n"
+                 "In a context with a single Warehouse, this includes "
+                 "goods stored in the Stock Location of this Warehouse, or any "
+                 "of its children.\n"
+                 "In a context with a single Shop, this includes goods "
+                 "stored in the Stock Location of the Warehouse of this Shop, "
+                 "or any of its children.\n"
+                 "Otherwise, this includes goods stored in any Stock Location "
+                 "typed as 'internal'."),
+        'incoming_qty': fields.function(_product_available, multi='qty_available',
+            type='float',  digits_compute=dp.get_precision('Product UoM'),
+            string='Incoming',
+            help="Quantity of products that are planned to arrive.\n"
+                 "In a context with a single Stock Location, this includes "
+                 "goods arriving to this Location, or any of its children.\n"
+                 "In a context with a single Warehouse, this includes "
+                 "goods arriving to the Stock Location of this Warehouse, or "
+                 "any of its children.\n"
+                 "In a context with a single Shop, this includes goods "
+                 "arriving to the Stock Location of the Warehouse of this "
+                 "Shop, or any of its children.\n"
+                 "Otherwise, this includes goods arriving to any Stock "
+                 "Location typed as 'internal'."),
+        'outgoing_qty': fields.function(_product_available, multi='qty_available',
+            type='float',  digits_compute=dp.get_precision('Product UoM'),
+            string='Outgoing',
+            help="Quantity of products that are planned to leave.\n"
+                 "In a context with a single Stock Location, this includes "
+                 "goods leaving from this Location, or any of its children.\n"
+                 "In a context with a single Warehouse, this includes "
+                 "goods leaving from the Stock Location of this Warehouse, or "
+                 "any of its children.\n"
+                 "In a context with a single Shop, this includes goods "
+                 "leaving from the Stock Location of the Warehouse of this "
+                 "Shop, or any of its children.\n"
+                 "Otherwise, this includes goods leaving from any Stock "
+                 "Location typed as 'internal'."),
+        'track_production': fields.boolean('Track Manufacturing Lots', help="Forces to specify a Production Lot for all moves containing this product and generated by a Manufacturing Order"),
         'track_incoming': fields.boolean('Track Incoming Lots', help="Forces to specify a Production Lot for all moves containing this product and coming from a Supplier Location"),
         'track_outgoing': fields.boolean('Track Outgoing Lots', help="Forces to specify a Production Lot for all moves containing this product and going to a Customer Location"),
         'location_id': fields.dummy(string='Location', relation='stock.location', type='many2one'),