eiru_reports_mrp/views/menus.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
  <data>
    <!-- main menu -->
    <menuitem id="mrp_parent_menu" name="Informes" parent="base.menu_mrp_root" sequence="200"/>

    <!-- sub menu -->

    <menuitem id="mrp_mrp_history_menu" parent="mrp_parent_menu" name="Listado de producción" action="mrp_mrp_action" sequence="3"/>

    <menuitem id="mrp_mrp_analisys_menu" parent="mrp_parent_menu" name="Análisis de producción" action="mrp_analisys_action" sequence="4"/>


  </data>
</openerp>