customer-specified additional component(s) that are either mechanically or electronically connected to the vehicle or powertrain before (or after) delivery to the final customer “(e.g., custom floor mats, truck bed liners, wheel covers, sound system enhancements, sunroofs, spoilers, super-chargers, etc.)

product quality planning process that supports development of a product or service that will satisfy customer requirements; APQP serves as a guide in the development process and also a standard way to share results between organizations and their customers; APQP covers design robustness, design testing and specification compliance, production process design, quality inspection standards, process capability, production capacity, product packaging, product testing and operator training plan, among other items.

replacement part(s) not procured or released by an OEM for service part applications, which may or may not be produced to original equipment specifications.

documented permission for a person(s) specifying rights and responsibilities related to giving or denying permissions or sanctions within an organization.

Source: IATF (https://www.iatfglobaloversight.org/)