Performance characteristic represents ratio of benefits to expenses. It is applied explicitly or intuitively to understand the evolution of a system in time (to recognize why a system A replaced a system B). Performance characteristic is close by its meaning to concept of Ideality from TRIZ.
Context: Researching Future
The product is the final result of an industrial process, which can be expressed in terms of a material entity, a specific kind of energy or signal/information.
Context: FORMAT methodology
 In TRIZ the degree of ideality is defined as a ratio between the system performance and the expenses required to perform these performances. The higher performance for lower expenses means the greater ideality.
In practice of inventive problem solving, the concepts of Ideal machine, Ideal process, and Ideal substance [Altshuller, 1979] guide direction of problem solving process.