Economies of scale refer to the cost advantages that arise from increased production of goods, where the cost per unit shrinks in relation to the increased production output. It is essential for companies to reach these economies of scale in order to stay in business and maintain a competitive advantage in the marketplace. When companies increase their output, the fixed costs, (such as rent and machinery) are divided over a greater number of units, leading to lower costs for each unit.

Economies of scale can be both internal and external. Internal economies are those cost advantages that are caused by factors within a single company, such as purchasing power, technical know-how and capital expenditure. These economies are the result of the company using its resources in the most efficient and cost-effective way possible. External economies refer to the cost advantages that result from the conditions of a certain industry market. For example, external economies could arise due to better access to raw materials, specialised skills, or improved technology.

A company's size will have an effect on its capacity to achieve economies of scale. Larger companies with substantial revenues and resources will be able to take advantage of lower pricing and higher production levels, while small businesses may struggle to compete on this basis. The ability to produce goods in large quantities, combined with reduced costs, allows large companies to gain a competitive edge by selling their products at lower prices.

To achieve economies of scale, companies must find the optimum operating level in order to optimise production. This may involve reducing production costs by reorganising the workforce, changing their capital structure or investing in new technology. Companies must also be aware of external factors such as competition and the changing industry landscape, as these factors can impact the company's ability to achieve economies of scale.

In conclusion, economies of scale are an essential factor for sustainability in the business world. Companies must strive to reach these cost advantages in order to remain competitive and ensure long-term success. The ability to produce goods at lower costs, combined with increased efficiency, gives companies an advantage in the marketplace. It is important for businesses to understand both internal and external factors which affect their production capabilities, so that they can successfully achieve economies of scale.