Bought-in Components: they would use bought in components if high numbers of products are needed, availability of sub-assemblies, suppliers make standardised CAD files for easy integration, components can be bought in bulk, no need for their own manufacturing facility, specialist equipment and expertise of suppliers not needed, greater level of consistency in components, ISO 9001 accreditation framework can be used, some examples include tyres, audio connectors, batteries, fuses, printer cartridges, ballpoint pen refills, memory cards.