The weighted exponential distribution is a promising skewed in the life-testing experiment. joint progressive type-II censoring (JPC) scheme an effective approach to reducing costs. In this paper, we consider estimates of parameters with JPC data. Two populations, whose scale are same but shape which different, chosen be studied. We first evaluate maximum likelihood method. Because cannot obtai...

We consider a loss system with a fixed budget for servers. The system owner’s problem is choosing the price, and selecting the number and quality of the servers, in order to maximize profits, subject to a budget constraint. We solve the problem with identical and different service rates as well as with preemptive and non-preemptive policies. In addition, when the policy is preemptive we prove t...

We provide a simple method to assess stability and capacity of general Exponential Backoff (EB) mechanisms in the case of two contending stations. We prove that, in the case of Binary EB with balanced traffic, the system is stable for total arrival rates up to λ = 0.6096, which represents also the capacity of the system. Furthermore, we obtain the capacity curve also for the case of unbalanced ...