Paolo Rocchi

IBM, via Shangai 53, 00144 Roma, Italy
Tel. +39 6 5966 5213; Fax +39 6 5966 5212 ([email protected])

Received: 12 July 2006 / Accepted: 27 July 2006 / Published: 11 August 2006

Abstract: The present research discusses four ‘physical’ models of system and calculates the
reliability function during system’s aging and maturity on the basis of the system structure.

Keywords: System aging, Boltzmann-like entropy, reliability function, Weibull distribution,
Gompertz distribution.