  In this paper, we develop a new method to estimate the parameters of a
deteriorating system under perfect condition-based maintenance. This method is
based on the asymptotical behavior of the system, which is studied by using the
renewal process theory. We obtain a Central Limit Theorem (CLT in the
following) for the parameters. We compare the accuracy and the speed of the
method with the maximum likelihood one (ML method in the following) on
different examples.
