What is a method for producing or delivering a product or service just at the time the customer wants it?

A method for producing or delivering a product or service just at the time the customer wants it is called "Just-In-Time" (JIT) manufacturing. This approach minimizes inventory costs by ensuring that materials and products are produced or delivered only as they are needed in the production process or by the customer. JIT relies on precise scheduling and efficient supply chain management to align production with customer demand, reducing waste and improving overall efficiency. This method is commonly used in industries like automotive manufacturing and retail.