partner-contact/crm_partner_department/views/res_partner_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>

<record model="ir.ui.view" id="view_partner_form_department">
    <field name="name">Partner form with department</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_partner_form"/>
    <field name="arch" type="xml">
        <field name="phone" position="before">
            <field name="department"
                   placeholder="Department"
                   attrs="{'invisible': [('is_company','=', True)]}"
                   options='{"no_open": True}'/>
        </field>
        <xpath expr="//field[@name='child_ids']/form//field[@name='phone']" position="before">
            <field name="department"
                   placeholder="Department"
                   attrs="{'invisible': [('is_company','=', True)]}"
                   options='{"no_open": True}'/>
        </xpath>
    </field>
</record>

<!-- Uncomment this to add a new column to tree view
<record model="ir.ui.view" id="view_partner_tree_department">
    <field name="name">Partner tree with department</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_partner_tree"/>
    <field name="arch" type="xml">
        <field name="phone" position="before">
            <field name="department"/>
        </field>
    </field>
</record>
-->

<record model="ir.ui.view" id="view_res_partner_filter_department">
    <field name="name">Partner search with department</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_res_partner_filter"/>
    <field name="arch" type="xml">
        <field name="category_id" position="after">
            <field name="department"/>
        </field>
        <filter string="Salesperson" position="after">
            <filter string="Department"
                    domain="[('is_company', '=', False)]"
                    context="{'group_by': 'department'}"/>
        </filter>
    </field>
</record>

</data>
</openerp>