What is the process called in which large volumes of a product are manufactured?

The process referred to in the question as manufacturing large volumes of a product is known as large-scale production. This method is specifically designed for producing high quantities of a product, often utilizing assembly lines or continuous production techniques. Large-scale production is efficient and cost-effective, enabling manufacturers to benefit from economies of scale by reducing the cost per unit as production volume increases.

In contrast, small-scale production typically refers to producing limited quantities of a product, often focusing on artisanal or bespoke methods. Batch production involves creating goods in groups or batches, where a set amount of a product is made before switching to a different product. Mass customization allows for tailoring products to individual customer specifications while still using mass production techniques, but it does not emphasize the production of large volumes in the same way that large-scale production does. Thus, large-scale production is the correct term for the context of the question.