The eight’chapter in the high level structure is the most extensive one. It includes Operational planning and control (8.1), requirements for products and services (8.2), Design and Development of products and services (8.3), Control of processes, products and suppliers (8.4), the actual production or service being provided (8.5), release of products or services (8.6), and how to manage non conform deliveries (8.7).
If you want to learn more about operation management Wikipedia is a good starting point with an interesting page about production systems, metrics, configuration and management, service operations, mathematical modeling and safety, risk and maintenance.
It has to be stated here that operations can refer to production as well as services. Every kind of organization has inputs and outputs and can be modeled into a system with its processes and therefore there are always opportunities for improvement and operational risks to be addressed.