In this paper, we revisit and clarify the celebrated machine maintenance and sale age model of Kamien and Schwartz (KS) involving a machine subject to failure. KS formulate and solve the problem as a deterministic optimal control problem with the probability of the machine failure as the state variable. Thus, they obtain deterministic optimal maintenance and sale date. We study two underlying s...

conclusions it can be indicated that reinforcing components of emotional intelligence, especially emotional-awareness and impulse control, are effective methods to develop against substance use in among drug-dependent individuals. background drug addiction is one of the most significant problems related to general health in the world, creating various mental problems in addicts and leading to s...

In the classical approach to determine how many spare parts to stock, the spare parts shortage costs or the minimum fill rate are a key factor. A difficulty with this approach lies in the estimation of these shortage costs or the determination of appropriate minimum fill rates. In an attempt to overcome this problem, we propose to use the data gathered in reliability centered maintenance studie...