%0 Journal Article
%T Optimum inspection policy for a protective device
%J Reliability engineering
%D 1984
%A Shima, E.
%A Nakagawa, T.
%V 7
%N 3
%P 123-132
%X Almost all machines install a protective device to protect against unexpected internal or external shocks. Such a device should be inspected often to check whether it is working. A machine with a protective device which is inspected at predetermined 'check times' is considered. Using the usual calculus method of probability, two expected costs are derived. When the failure time of the device is exponential, optimum checking intervals to minimize the expected costs are obtained and numerical examples are given.<p />
%G 
%I Elsevier Publishing
%@ 0143-8174
%U http://dx.doi.org/10.1016/0143-8174(84)90011-8