1. A method of evaluating an infrastructure having a plurality of components based upon exergy loss values, said method comprising: aggregating exergy loss values of the components; determining whether the aggregated exergy loss values exceed target exergy loss values; in response to the aggregated exergy loss values falling below the target exergy loss values, determining whether historical exergy loss values indicate a trend to remain below the target exergy loss values; and in response to the historical exergy loss values trending to go above the target exergy loss values, determining whether the trend projects that the exergy loss values will exceed the target exergy loss values within a predefined time period.