This investigation deals with the transient analysis of the machine repair system consisting of M-operating units operating under the care of single repairman. To improve the system reliability/availability, Y warm standby and S cold standby units are provided to replace the failed units. In case when all spares are being used, the failure of units occurs in degraded fashion. In such situation ...

In this paper, we study N-policy for a finite population Bernoulli feedback queueing model for machine repair problem with degraded failure. The running times of the machines between breakdowns have an exponential distribution. The repair times of the machines are independent and identically distributed random variables. If at any time a machine fails, it is sent to the repairman for repairing,...

In this study, a stochastic model is developed to analyze performance measures of a manufacturing cell, which is operated under degraded mode. The model is used to determine reliability and productivity of the cell, as well as the utilization of its components, under equipment failures and fault-tolerant states. The model and the results can be useful for design engineers and operational manage...

In this study, a stochastic model is developed to analyze performance measures of a manufacturing cell, which is allowed to operate under degraded mode. The model is used to determine reliability and productivity of the cell, as well as the utilization of its components, under various operational conditions, including equipment failures and fault-tolerant states. The model and the results can b...

We address the problem of how to integrate fault-tolerant external and internal clock synchronization. In this paper we propose a new external/internal clock synchronization algorithm which provides both external and internal clock synchronization for as long as a majority of the reference time servers (servers with access to reference time) stay correct. When half or more of the reference time...

In this research, we study an optimal overhaul–replacement policy of a multi-degraded repairable system sold with a free replacement warranty. In the proposed replacement policy, a maintenance action and failure are dependent on a system degradation level and the system age, and hence the replacement model will provide more effective maintenance decisions. Failure of the system is modeled using...

This paper presents a model for deterioration and repair of a railway line. The critical failure is “broken line”. Two main failure mechanisms are considered: either shock failure, i.e. an immediate critical failure (without “warning”), or the critical failure occurs as the result of a degradation process, i.e. a degraded failure (crack) occurs first. Various types of inspection and maintenance...

A system that can continue critical operations, perhaps in a degraded mode, in the face of a partially successful cyber attack can be termed “intrusion tolerant.” The workshop will provide a forum for the presentation and discussion of current efforts to develop subsystems and systems that display some degree of intrusion tolerance. The workshop will also provide the opportunity for demonstrati...