TOTAL PRODUCT: The total quantity of output produced by a firm for a given quantity of inputs. Total product is the foundation upon which the analysis of short-run production for a firm is analyzed. The usual framework is to analyze total product when in a variable input (labor) changes, for a given amount of a fixed input (capital). Two related concepts derived from total product are average product and marginal product. See also | total physical product | average product | marginal product | short-run production | fixed input | variable input |