diff --git a/equipment.py b/equipment.py
index d52f335..58617fc 100644
--- a/equipment.py
+++ b/equipment.py
@@ -1,19 +1,27 @@
 from collections import defaultdict
 from trytond.pool import Pool
-from trytond.model import ModelSQL, ModelView, Unique, fields
+from trytond.model import (
+    Workflow, ModelSQL, ModelView, Unique, fields)
 from trytond.pyson import Eval
 from trytond.exceptions import UserError
 
-class OpticalEquipment(ModelSQL, ModelView):
+class OpticalEquipment(Workflow, ModelSQL, ModelView):
     'Optical Equipment'
     __name__ = 'optical_equipment.equipment'
 
     code_readonly = fields.Function(
         fields.Boolean("Code Readonly"), 'get_code_readonly')
+
     code = fields.Char(
-        "Code", select=True,states={
-            'readonly': Eval('code_readonly', False),
-            })
+        "Code", select=True,states={'readonly': True })
+    
+    state = fields.Selection([
+             ('draft', "Draft"),
+             ('registred', "Registred"),
+             ('contrated', "Contrated")
+             ], "State",
+       required=True, readonly=True, sort=False)
+
     company = fields.Many2One('company.company', "Company")
     location = fields.Many2One('stock.location', "Location")
     propietary = fields.Many2One('party.party', "Propietary")
@@ -59,6 +67,14 @@ class OpticalEquipment(ModelSQL, ModelView):
             ('serial_unique', Unique(t, t.serial),
              'optical_equipment.msg_serial_unique')
             ]
+        cls._transitions = ({ 
+            ('draft', 'registred'),
+            ('registred', 'contrated'),
+            })
+        cls._buttons.update({
+            'draft': {},
+            'registred': {}})
+        
 
     def default_code_readonly(cls):
         pool = Pool()
@@ -69,6 +85,10 @@ class OpticalEquipment(ModelSQL, ModelView):
     def get_code_readonly(self, name):
         return self.default_code_readonly()
 
+    @classmethod
+    def default_state(cls):
+       return 'draft'
+
     @classmethod
     def _new_code(cls):
         pool = Pool()
@@ -78,3 +98,15 @@ class OpticalEquipment(ModelSQL, ModelView):
         if sequence:
             return sequence.get()
 
+    @classmethod
+    @ModelView.button
+    @Workflow.transition('draft')
+    def draft(cls, equipments):
+        pass
+        #raise userError(str('draft'))
+
+    @classmethod
+    @ModelView.button
+    @Workflow.transition('registred')
+    def registred(cls, equipments):
+        pass
diff --git a/equipment.xml b/equipment.xml
index 5d29471..4528483 100644
--- a/equipment.xml
+++ b/equipment.xml
@@ -15,11 +15,17 @@
             name="Equipment"
             sequence="40"
             id="menu_equipment"/>
+	<!--
 	<record model="ir.action.act_window" id="act_optical_equipment">
 	    <field name="name">Equipments</field>
 	    <field name="res_model">optical_equipment.equipment</field>
+	</record> -->
+	<record model="ir.action.act_window" id="act_optical_equipment_form">
+	    <field name="name">Equipments</field>
+	    <field name="res_model">optical_equipment.equipment</field>
+	    <field name="search_value"></field>
 	</record>
-        <record model="ir.ui.view" id="optical_equipment_view_tree">
+	<record model="ir.ui.view" id="optical_equipment_view_tree">
             <field name="model">optical_equipment.equipment</field>
             <field name="type">tree</field>
             <field name="name">optical_equipment_tree</field>
@@ -30,19 +36,63 @@
             <field name="name">optical_equipment_form</field>
         </record>
 	<record model="ir.action.act_window.view" id="act_optical_equipment_view1">
-            <field name="sequence" eval="50"/>
+            <field name="sequence" eval="10"/>
 	    <field name="view" ref="optical_equipment_view_tree"/>
-            <field name="act_window" ref="act_optical_equipment"/>
+            <field name="act_window" ref="act_optical_equipment_form"/>
 	</record>
         <record model="ir.action.act_window.view" id="act_optical_equipment_view2">
-            <field name="sequence" eval="50"/>
+            <field name="sequence" eval="20"/>
 	    <field name="view" ref="optical_equipment_view_form"/>
-            <field name="act_window" ref="act_optical_equipment"/>
+            <field name="act_window" ref="act_optical_equipment_form"/>
+	</record>
+        <record model="ir.action.act_window.domain" id="act_optical_equipment_form_domain_draft">
+            <field name="name">Draft</field>
+            <field name="sequence" eval="10"/>
+            <field name="domain"
+                eval="[('state', '=', 'draft')]"
+                pyson="1"/>
+            <field name="count" eval="True"/>
+            <field name="act_window" ref="act_optical_equipment_form"/>
+        </record>
+        <record model="ir.action.act_window.domain" id="act_optical_equipment_form_domain_registred">
+            <field name="name">Registred</field>
+            <field name="sequence" eval="20"/>
+            <field name="domain"
+                eval="[('state', '=', 'registred')]"
+                pyson="1"/>
+            <field name="count" eval="True"/>
+            <field name="act_window" ref="act_optical_equipment_form"/>
+        </record>
+        <record model="ir.action.act_window.domain" id="act_optical_equipment_form_domain_contrated">
+            <field name="name">Contrated</field>
+            <field name="sequence" eval="30"/>
+            <field name="domain"
+                eval="[('state', '=', 'contrated')]"
+                pyson="1"/>
+            <field name="count" eval="True"/>
+            <field name="act_window" ref="act_optical_equipment_form"/>
+        </record>
+        <record model="ir.action.act_window.domain" id="act_optical_equipment_form_domain_all">
+            <field name="name">All</field>
+            <field name="sequence" eval="9999"/>
+            <field name="domain"></field>
+            <field name="act_window" ref="act_optical_equipment_form"/>
+        </record>
+	<record model="ir.model.button" id="draft_equipment_button">
+	    <field name="name">draft</field>
+	    <field name="string">Draft</field>
+	    <field name="model" search="[('model', '=', 'optical_equipment.equipment')]"/>
+	</record>
+	<record model="ir.model.button" id="registred_equipment_button">
+	    <field name="name">registred</field>
+	    <field name="string">Registred</field>
+	    <field name="model" search="[('model', '=', 'optical_equipment.equipment')]"/>
 	</record>
 	<menuitem parent="menu_equipment"
-		  action="act_optical_equipment"
-		  sequence="40"
-		  id="menu_optical_equipment"/>
+		  action="act_optical_equipment_form"
+		  sequence="10"
+		  id="menu_optical_equipment_form"/>
+	
 	<record model="ir.ui.menu-res.group"
             id="menu_party_group_equipment_admin">
             <field name="menu" ref="menu_equipment"/>
diff --git a/view/optical_equipment_form.xml b/view/optical_equipment_form.xml
index 23fe8c5..20aed25 100644
--- a/view/optical_equipment_form.xml
+++ b/view/optical_equipment_form.xml
@@ -49,5 +49,10 @@
 	    <field name="subscription_history"/>
 	</page>
     </notebook>
-
+    <group col="2" colspan="2" id="button">
+	<button name="draft"/>
+	<button name="registred"/>
+    </group>
+    <label name="state"/>
+    <field name="state"/>
 </form>
diff --git a/view/optical_equipment_tree.xml b/view/optical_equipment_tree.xml
index 8fb6c0e..7a9db32 100644
--- a/view/optical_equipment_tree.xml
+++ b/view/optical_equipment_tree.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0"?> 
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
-     this repository contains the full copyright notices and license terms. -->
+     this repository contains the full copyright notices and license terms.-->
 <tree>
     <field name="code"/>
     <field name="company"/>