Quality and quantity guarantee refers to ensuring that the quality of products or services meets the specified standards or requirements in the process of production or service provision, and keeping its quality unchanged within the specified time. In the commercial field, quality and quantity usually refer to ensuring that the quality and quantity of products meet the requirements of contracts or agreements to meet the needs and expectations of customers.
This means that manufacturers or service providers need to take a series of measures to ensure the quality of products or services, such as using high-quality raw materials, carrying out strict quality control and providing after-sales service.