A look at the upper and lower means in reliability framework

In this work, a relation between the some notions in reliability and the upper and lower means is established. The similarity between income inequality curves and the upper and lower means gives the idea of connecting economy and reliability. So, we also refer the relationship between the Zenga new inequality curve and some uncertainty measures. The result is illustrated with several models commonly used in informetrics, such as exponential, Pareto and lognormal.