This paper presents a decomposition technique for the service station reliability in a discrete-time repairable Geom/G/1 queueing system, in which the server takes exhaustive service and multiple adaptive delayed vacation discipline. Using such a novel analytic technique, some important reliability indices and reliability relation equations of the service station are derived. Furthermore, the s...

This paper introduces a Markov model for a multi-state repairable system in which some states are changeable in the sense that whether those states are up or down depends on the recent system evolution history. Several reliability indexes, such as availability, mean up time, steady-state reliability, are calculated using the matrix method. A sufficient condition under which the availabilities o...

In this paper, Structured Analysis (SA) is employed in mobile communications system simulation software development. Programming via SA provides a well-defined and easily maintainable structure for the software in a graphical form, also revealing any hidden dependencies in the software. Thus, the resulting simulator is more reliable and maintainable over its whole lifecycle. With modern SA tool...