diff --git a/addons/mrp/mrp.py b/addons/mrp/mrp.py
index 67b1f9621aa..df2ae4edcb9 100644
--- a/addons/mrp/mrp.py
+++ b/addons/mrp/mrp.py
@@ -149,9 +149,6 @@ class mrp_bom(osv.osv):
     _description = 'Bill of Material'
     _inherit = ['mail.thread']
 
-    def _get_bom_ids_from_product_template_ids(self, cr, uid, product_template_ids, context=None):
-        return self.pool['mrp.bom'].search(cr, uid, [('product_tmpl_id', 'in', product_template_ids)], context=context)
-
     _columns = {
         'code': fields.char('Reference', size=16),
         'active': fields.boolean('Active', help="If the active field is set to False, it will allow you to hide the bills of material without removing it."),
@@ -163,11 +160,6 @@ class mrp_bom(osv.osv):
             domain="['&', ('product_tmpl_id','=',product_tmpl_id), ('type', 'in', ['product', 'consu']]",
             help="If a product variant is defined the BOM is available only for this product."),
         'bom_line_ids': fields.one2many('mrp.bom.line', 'bom_id', 'BoM Lines', copy=True),
-        'categ_id': fields.related('product_tmpl_id', 'categ_id', type='many2one', relation='product.category', string='Product Category', readonly=True,
-            store = {
-                'mrp.bom': (lambda self, cr, uid, ids, c=None: ids, ['product_tmpl_id'], 10),
-                'product.template': (_get_bom_ids_from_product_template_ids, ['categ_id'], 10)
-            }),
         'product_qty': fields.float('Product Quantity', required=True, digits_compute=dp.get_precision('Product Unit of Measure')),
         'product_uom': fields.many2one('product.uom', 'Product Unit of Measure', required=True, help="Unit of Measure (Unit of Measure) is the unit of measurement for the inventory control"),
         'date_start': fields.date('Valid From', help="Validity of this BoM. Keep empty if it's always valid."),
@@ -548,9 +540,6 @@ class mrp_production(osv.osv):
             res += self.pool.get("mrp.production").search(cr, uid, [('move_lines', 'in', move.id)], context=context)
         return res
 
-    def _get_mo_ids_from_product_template_ids(self, cr, uid, product_template_ids, context=None):
-        return self.pool["mrp.production"].search(cr, uid , [('product_id.product_tmpl_id', 'in', product_template_ids)], context=context)
-
     _columns = {
         'name': fields.char('Reference', required=True, readonly=True, states={'draft': [('readonly', False)]}, copy=False),
         'origin': fields.char('Source Document', readonly=True, states={'draft': [('readonly', False)]},
@@ -614,11 +603,6 @@ class mrp_production(osv.osv):
         'company_id': fields.many2one('res.company', 'Company', required=True),
         'ready_production': fields.function(_moves_assigned, type='boolean', string="Ready for production", store={'stock.move': (_mrp_from_move, ['state'], 10)}),
         'product_tmpl_id': fields.related('product_id', 'product_tmpl_id', type='many2one', relation='product.template', string='Product'),
-        'categ_id': fields.related('product_tmpl_id', 'categ_id', type='many2one', relation='product.category', string='Product Category', readonly=True,
-            store = {
-                'mrp.production': (lambda self, cr, uid, ids, c=None: ids, ['product_tmpl_id'], 10),
-                'product.template': (_get_mo_ids_from_product_template_ids, ['categ_id'], 10)
-            }),
     }
 
     _defaults = {
diff --git a/addons/mrp/mrp_view.xml b/addons/mrp/mrp_view.xml
index 8fead413a53..8aeda25202a 100644
--- a/addons/mrp/mrp_view.xml
+++ b/addons/mrp/mrp_view.xml
@@ -394,7 +394,6 @@
                                 will contain the raw materials, instead of the finished product.
                             </p>
                             <field name="company_id" groups="base.group_multi_company" options="{'no_create': True}"/>
-                            <field name="categ_id"/>
                         </group>
                     </group>
                     <notebook>
@@ -466,14 +465,12 @@
                     <field name="product_tmpl_id" string="Product"/>
                     <field name="product_id" string="Variant"/>
                     <field name="company_id" groups="base.group_multi_company"/>
-                    <field name="categ_id"/>
                     <group expand="0" string="Group By...">
                         <filter string="Product" domain="[]" context="{'group_by':'product_tmpl_id'}"/>
                         <filter string='Default Unit of Measure' domain="[]" context="{'group_by' : 'product_uom'}"/>
                         <filter string="Work Order Operations" domain="[]" context="{'group_by':'routing_id'}"/>
                         <filter string='Type' domain="[]" context="{'group_by' : 'type'}"/>
-                        <filter string=" Valid From Month" domain="[]" context="{'group_by':'date_start'}" help="Valid From Date by Month"/>
-                        <filter string="Product Category" domain="[]" context="{'group_by':'categ_id'}"/>
+                        <filter string="Valid From Month" domain="[]" context="{'group_by':'date_start'}" help="Valid From Date by Month"/>
                    </group>
                 </search>
             </field>
@@ -621,7 +618,6 @@
                             <field name="routing_id" groups="mrp.group_mrp_routings"/>
                             <field name="user_id" context="{'default_groups_ref': ['base.group_user', 'base.group_partner_manager', 'mrp.group_mrp_user']}"/>
                             <field name="origin"/>
-                            <field name="categ_id"/>
                         </group>
                         <group groups="stock.group_locations">
                             <field name="location_src_id" domain="[('usage','=','internal')]" on_change="location_id_change(location_src_id,location_dest_id)"/>
@@ -860,13 +856,11 @@
                     <field name="product_tmpl_id"/>
                     <field name="product_id"/>
                     <field name="routing_id" groups="mrp.group_mrp_routings"/>
-                    <field name="categ_id"/>
                     <group expand="0" string="Group By...">
                         <filter string="Product" domain="[]" context="{'group_by':'product_id'}"/>
                         <filter string="Work Order Operations" domain="[]" context="{'group_by':'routing_id'}"/>
                         <filter string="Status" domain="[]" context="{'group_by':'state'}"/>
                         <filter string="Scheduled Month" domain="[]" context="{'group_by':'date_planned'}" help="Scheduled Date by Month"/>
-                        <filter string="Product Category" domain="[]" context="{'group_by':'categ_id'}"/>
                     </group>
                </search>
             </field>