Production isoquants show the various combinations of inputs necessary for the firm to produce a given output. A set of isoquants,or isoquant map,describes the firm's production function. Output increases as we move from isoquant Q(at which 55 units per year are produced at points such as A and D),to isoquant Q2 (75 units per year at points such as B and F)and to isoquant Q3 (90 units per year at points such as C and E). Production isoquants show the various combinations of inputs necessary for the firm to produce a given output. A set of isoquants, or isoquant map, describes the firm’s production function. Output increases as we move from isoquant Q1 (at which 55 units per year are produced at points such as A and D), to isoquant Q2 (75 units per year at pointssuch as B and F) and to isoquant Q3 (90 units per year at pointssuch as C and E)