What does a point inside or outside the production possibilities frontier mean?

The location of a point relative to the production possibilities frontier reveals whether resources are being used efficiently. Points on the frontier represent the most efficient use of available resources. A point inside the frontier is attainable but inefficient, meaning output could increase without adding new resources. A point outside the frontier represents a level of production that is currently unattainable with existing resources and technology. As an economy’s productive capacity expands through technological innovation, investment, or improvements in labor and skills, the frontier can shift outward, making previously unattainable combinations possible.