Performance of ATM networks depends on switch performance and architecture. This paper presents a simulation study of a new dynamic allocation of input buffer space in ATM switching elements. The switching elements are composed of input and output buffers which are used to store received and forwarded cells, respectively. Efficient and fair use of buffer space in an ATM switch is essential to g...

This work presents a methodology to assess maintenance teams in the determination of the degree of redundancy that an active component must have in order to minimize its system life-cycle cost and in the definition of the corresponding maintenance plan schedule. The minimal required data are three average costs and one reliability function. It is useful in a system’s design phase, since in this...

Optimal preventive maintenance and repairmen policies for a system of machines subject to degradation with age and intermittent breakdowns and repairs are derived using optimal control theory. When this system of machines forms part of a dynamic process control system, a method of obtaining optimal closed-loop control law is indicated. I . INTRODUC~ON Many large industrial systems have two dist...

Most companies register a large quantity of information in their maintenance data bases, but this is often poorly exploited. An efficient valorization of a maintenance history can improve future maintenance strategies. In maintenance optimisation, four general types of maintenance strategies are taken into account such as: a) corrective, b) preventive, c) predictive, and d) reliability centered...

This paper examines a discrete material manufacturing system consisting of three machines that are subject to breakdown and one buffer of finite capacity. It is assumed that the buffer has two immediate preceding machines performing the same operations and one immediate succeeding machine receiving material from the buffer. When the buffer reaches its own capacity, one of the two preceding mach...

The study of industrial multistage component’s reliability, availability and efficiency poses a constant challenge for the manufacturing industry. Components that suffer wear tear must be replaced according to times recommended by manufacturers users machines. This paper studies influence individual maintenance values Main Time To Repair (MTTR), Provisioning (TTPR) Lost Production (TLP) each co...

maintenance process is one of the most necessary processes in every organization, whose main task is maintaining machines in desired conditions or restoring machines from non-optimal (nonoperational)conditions to optimal (operational) conditions. machines failure would result in loss of machines availability time, and rise of both organization costs and production time. also, it may cause irrep...