Abstract This paper deals with a retrial queuing system finite number of sources and collision the customers, where server is subject to random breakdowns repairs depending on whether it idle or busy. A significant difference this from previous ones that service time assumed follow general distribution while server’s lifetime repair supposed be exponentially distributed. The considered investig...

BACKGROUND Communication breakdowns are a common threat to surgical safety, but there are little data to guide initiatives to improve communication. STUDY DESIGN In surgeon-review of 444 surgical malpractice claims from 4 liability insurers, we identified 60 cases involving communication breakdowns resulting in harm to patients. Two surgeon-reviewers analyzed these cases to identify common ch...

Two-phase M/Ek/1 queueing system with N -policy for exhaustive batch service with gating, and server startups and breakdowns is studied in this paper. The customers arrive individually according to a Poisson process and waiting customers receive batch service all at a time in the first phase and are served individually in the second phase. The server is turned off each time the system empties, ...

Economou and Kanta (2008) [4] considered equilibrium customer strategies in the observable M/M/1 queue with an unreliable server. It is assumed that the server alternates between on and off periods. Upon arrival, the customers can observe the queue length and will decide whether to join or balk the system according to the information about the server’s state based on a linear reward-cost struct...

Abstract: The cumulative damage of highly reliable products that subject to multiple loading stresses is investigated under Wiener process. Optimal strategies on the constant-stress accelerated degradation test plan are established to reach a compromised decision between the experiment budget and the estimation precision on the reliability inference. An algorithm is provided to search an optima...

Heterogeneous servers which can differ in service speed and reliability are getting more popular in modelling of modern communication systems. For a two-server queueing system with one non-reliable server and constant retrial discipline we formulate an optimal allocation problem for minimizing a long-run average cost per unit of time. Using a Markov decision process formulation we prove a numbe...

BACKGROUND: Communication breakdowns are a common threat to surgical safety, but there are little data to guide initiatives to improve communication. STUDY DESIGN: In surgeon-review of 444 surgical malpractice claims from 4 liability insurers, we identified 60 cases involving communication breakdowns resulting in harm to patients. Two surgeonreviewers analyzed these cases to identify common cha...