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In this paper we present a new, non‐parametric approach to software reliability. It is based on a multivariate counting process with additive intensity, incorporating covariates and including several projects in one model. Furthermore, we present ways to obtain failure data from the development...
The reliability of a product is often affected by a damage process. In this paper we consider a shock model where at random times a shock causes a random damage. The cumulative damage process is assumed to be generated by a position‐dependent marking of a doubly stochastic Poisson process. Some...
Availability is a very important measure of performance for a repairable system which can be in one of two states: operational and non‐operational. In this paper we compare steady system availabilities of two different systems which are subject to imperfect repair policy. Comparisons of the...
The knowledge of the failure probability of industrial systems is now a crucial test of quality. But in practice, when components are repairable, two difficulties make actually untractable the explicit calculation. The first is the number of components and the second the general distribution of...
The purpose of this paper is estimating the lifetime distribution for two types of dynamic networks. The first one is a network, with edges existing in time, which may be erased independently of each other. The second one is a network with renewable edges. We consider effective Monte Carlo...
The main focus of this study is on the modelling of the warranty claims and evaluating the warranty expenses. The cost of each warranty claim depends on the non‐zero length of the repair time. Alternating renewal process is employed to model the operating and repair times. New results for...
Most maintenance policies assume that failed or used components are replaced with identical units. Actually, such a hypothesis neglects the possible obsolescence of the components. When a new, more reliable and less consuming technology becomes available, a decision has to be made as for the...
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