manufacture/quality_control_plan/views/product_view.xml

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

<!-- Copyright 2019 Marcelo Frare (Ass. PNLUG - Gruppo Odoo <http://odoo.pnlug.it>)
     Copyright 2019 Stefano Consolaro (Ass. PNLUG - Gruppo Odoo <http://odoo.pnlug.it>)
     License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl) -->
     
<odoo>
    <!-- inherits product form view with control plan -->
    <record id="view_product_template_plan" model="ir.ui.view">
        <field name="name">view.product.template.plan</field>
        <field name="model">product.template</field>
        <field name="inherit_id" ref="product.product_template_only_form_view"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='qc_triggers']/tree/field[@name='partners']"
                   position="after">
                <field name="plan_id"/>
            </xpath>
        </field>
    </record>

    <!-- inherits product category from view with control plan -->
    <record id="view_product_category_plan" model="ir.ui.view">
        <field name="name">view.product.category.plan</field>
        <field name="model">product.category</field>
        <field name="inherit_id" ref="quality_control.product_category_qc_form_view"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='qc_triggers']/tree/field[@name='partners']"
                   position="after">
                <field name="plan_id"/>
            </xpath>
        </field>
    </record>

</odoo>