An automobile maker procures gears for its motorcar engine directly from a supplier that manufactures them. What is the core value-added activity of the gear supplier for the automobile maker?

Maintenance involves the routine servicing and upkeep of machinery or equipment to ensure it operates effectively. While maintenance is important for the automobile after it has been assembled, it is not a core activity of the gear supplier, whose focus is on the initial production of components rather than their upkeep.

Repairs entail fixing broken or malfunctioning components after they have been used. Similar to maintenance, this activity occurs post-production and does not relate to the value-added process of manufacturing gears. The supplier's role does not include repairing gears, but rather delivering new, functioning parts.

Audits are evaluations or assessments of processes, systems, or financial records. While they can be relevant in managing supplier relationships and ensuring quality standards, they do not constitute a core activity of the gear supplier in terms of adding value through the production of gears. Audits are more about oversight than direct contribution to manufacturing.