In this section, we will consider how the indicators of "the ratio between the volume of produced goods (performance (operation), produced products (goods, works, services) and energy") and the amount of energy used to produce such goods. "

Science sometimes uses definitions that do not have the form of the equation dfd↔dfn, as in the case of explicit definitions. Such definitions are called implicit. Different classifications of implicit definitions are proposed. We will consider axiomatic definitions, such as those that, in some cases, are in shape most similar to the form of expression we analyze.

The definition of 'energy efficiency' is considered. It is shown that the statement in the draft Law "On Energy Efficiency" regarding the meaning of the term "energy efficiency" can not be considered as either a real explicit or implicit definition.