In his work Ashby (1956) shown the importance of a certain quantitative relation called the law of requisite variety. After this relation had been found, Ashby related it to a Shannon theorem on the quantity of noise or error that could be removed through a correction-channel (Shannon and Weaver, 1949; theorem 10). The native limitation in the law of the required variety, like the Shannon equation, applied in thermodynamics, is that they do not consider the relational nature of the organization. This means that the reality principle makes it necessary to absorb variety, however, rather than a problem to be solved from physics or chemistry, its solution is fundamentally epistemological, which means that distinctions on the external tend towards infinity and they correlate with the current paradigm.
This work introduces the concept of variety not required (VNR) from the Sustainability defined within the model of Relational Viability (Lavanderos et al., 2017).