mrp_reopen/mrp_view.xml

<?xml version="1.0"?>
<openerp>
    <data>
        <!--
        <record id="view_stock_journal_form_inherit" model="ir.ui.view">
            <field name="name">stock.journal.form</field>
            <field name="model">stock.journal</field>
            <field name="type">form</field>
            <field name="inherit_id" ref="stock.view_stock_journal_form"/>
            <field name="arch" type="xml">
                <field name="user_id" position="after">
                    <field name="reopen_posted"/>
                </field>
            </field>
        </record>
        -->

        <record id="mrp_production_form_reopen_view_inherit" model="ir.ui.view">
            <field name="name">mrp.production.form.reopen.inherit</field>
            <field name="model">mrp.production</field>
            <field name="inherit_id" ref="mrp.mrp_production_form_view"/>
            <field name="arch" type="xml">
                <xpath expr="/form/header/field[@name='state']" position="before">
                    <button name="action_reopen" type="object" states="done,cancel,ready,in_production" string="Reset To Draft" icon="gtk-convert" groups="mrp.group_mrp_manager" help="This will DELETE all generates stock moves"/>
                </xpath>
            </field>
        </record>
<!--
        <record id="view_picking_in_form_reopen_inherit" model="ir.ui.view">
            <field name="name">view.picking.in.form.reopen.inherit</field>
            <field name="model">stock.picking</field>
            <field name="type">form</field>
            <field name="inherit_id" ref="stock.view_picking_in_form"/>
            <field name="arch" type="xml">
                <button name="action_process" position="after">
                    <button name="action_reopen" type="object" states="done,cancel,assigned,confirmed" string="Reset To Draft" icon="gtk-convert" groups="base.group_extended" />
                </button>
            </field>
        </record>


        <record id="view_picking_form_reopen_inherit" model="ir.ui.view">
            <field name="name">view.picking.form.reopen.inherit</field>
            <field name="model">stock.picking</field>
            <field name="type">form</field>
            <field name="inherit_id" ref="stock.view_picking_form"/>
            <field name="arch" type="xml">
                <button name="action_process" position="after">
                    <button name="action_reopen" type="object" states="done,cancel,assigned,confirmed" string="Reset To Draft" icon="gtk-convert" groups="base.group_extended" />
                </button>
            </field>
        </record>
        -->

    </data>
</openerp>