customer satisfaction level depends on level that his expectations would be answered. with identifying customer expectations and implementation them in qfd, this ensures that important and critical demands of customer have been considered. qfd have been used and use for translating customer expectations to different subjects. what has been considered in this study, is qfd usage for translating ...

As the customers are the main reason of the formation and survival of the organization, not only understanding their obvious needs, but also forecasting, determining and guiding their hidden needs, design and implementing plans of offering services for meeting these needs for attracting customers are among cornerstone of any activity in the organization. In this research, one compares the perfo...

This paper, considers Network Failure Manufacturing System (NFPMS) and production control policy of unreliable multi-machines, multi-products with perishable items. The production control policy is based on the Hedging Point Policy (HPP). The important point in the simulation of this system is assumed that the customers who receive perishable item are placed in priority queue of the customers w...

Resumen Consideremos el sistema de colas con reintentos M2/G2/1 con dos tipos de clientes y política de reintentos lineal. Si un cliente llega al sistema y encuentra el servidor libre, entonces empieza su servicio inmediatamente. Si no, los clientes del primer tipo van a una cola y apenas se libera el servidor, el primer cliente empieza su servicio. El segundo tipo de clientes al encontrar el s...

This paper studies the behavior of a discrete queueing system which accepts synchronized arrivals and provides synchronized services. The number of arrivals occurring at an arriving point may follow any arbitrary discrete distribution possessing finite first moment and convergent probability generating function in I z [ ~< 1 + e with e > O. The system is equipped with an infinite buffer and one...

We consider an M/G/1 queue with general retrial times where the blocked customers may balk the system, or join the priority queue, or enter the orbit. As soon as a customer is served, he will decide either to leave the system or join the orbit for another service in accordance with an FCFS discipline. We assume that only the customer at the head of the orbit is allowed to retry for service. We ...

This study aims to determine the transient behavior of blended queue. Priority customers arrive over time and benefit from a threshold reservation policy, while non-priority ones can be contacted at any time. We show how compute Laplace transforms probabilities. Using uniformization technique, we prove some monotonicty properties expected number in queue, explaining why optimal should lower tha...

For a sequence of nite Markov chains L(N) we introduce the notion of \conver-gence time to equilibrium" T(N). For sequences that are obtained by truncating some countable Markov chain L we nd the convergence time to equilibrium in terms of Lyapunov function of Markov chain L. We apply this result to queue-ing systems with a limited number of customers: a priority system with several customer ty...