How a manufacturing is usually structured
A manufacturing plant is usually run by a plant manager with separate lines for production, quality, maintenance, supply chain and health & safety. Production is split by shift, with supervisors over line operators.
Quality reports independently
Standards such as ISO 9001 expect quality to have the authority to stop production, so the quality manager normally reports to the plant manager rather than to production.
Safety at the top
Placing the health & safety lead close to the plant manager signals that safety is not traded off against output.