-bottlenecks in serial production lines: Identification and application.
Calcul des idéaux d'un ordonné fini
Calcul exact de la disponibilité opérationnelle d'un système complexe
Calculation of optimal checkout intervals when failure rate figure increases with time
Calculation of steady-state probabilities of M/M queues: Further approaches.
Cálculo de la distribución del tiempo de vida de componentes mediante autopsia en sistemas binarios aditivos, serie-paralelo y paralelo-serie.
En este artículo se estudia el problema de determinar la función de distribución del tiempo de vida de las componentes de un sistema binario, a partir del conocimiento de las leyes que rigen el funcionamiento del sistema y del conjunto de componentes que causa su fallo (obtenida mediante autopsia del sistema en el momento de su deterioro).Se presentan los resultados de Meilijson (1981) y Nowik (1990) que proponen un sistema de ecuaciones implícito para obtener estas distribuciones. Sin embargo,...
Cálculo del número medio de máquinas activas en un grupo de un operario y N máquinas, con incidencias poissonianas y tiempos de servicio aleatorio.
Este artículo expone un método para el cálculo del número medio de máquinas en funcionamiento en un sistema formado por un operario y N máquinas iguales, con tiempos exponenciales de funcionamiento entre averías y tiempos de servicio aleatorios, idéntica e independientemente distribuidos. El modelo generaliza las conocidas fórmulas que se obtienen a partir de los modelos M/M/1 con centro emisor finito y de Ashcroft, que suelen utilizarse para el problema de asignación de máquinas.
Capacity and Maximal Value of the Network Flow with Multiplicative Constraints
Capacity expansion of a deteriorating facility under uncertainty
Capturing product development knowledge with task patterns: evaluation of economic effects
Centralized VERSUS decentralized production planning
In the course of globalization, many enterprises change their strategies and are coupled in partnerships with suppliers, subcontractors and customers. This coupling forms supply chains comprising several geographically distributed production facilities. Production planning in a supply chain is a complicated and difficult task, as it has to be optimal both for the local manufacturing units and for the whole supply chain network. In this paper two analytical models are used to solve the production planning...
Changing the Values of Parameters on Lot Size Reorder Point Model
Characterization of a class of lifetime distributions
Characterization of linear rational preference structures.
We consider the multiobjective decision making problem. The decision maker's (DM) impossibility to take consciously a preference or indifference attitude with regard to a pair of alternatives leads us to what we have called doubt attitude. So, the doubt may be revealed in a conscient way by the DM. However, it may appear in an inconscient way, revealing judgements about her/his attitudes which do not follow a certain logical reasoning.In this paper, doubt will be considered as a part of the information...
Characterization of optimal shapes and masses through Monge-Kantorovich equation
We study some problems of optimal distribution of masses, and we show that they can be characterized by a suitable Monge-Kantorovich equation. In the case of scalar state functions, we show the equivalence with a mass transport problem, emphasizing its geometrical approach through geodesics. The case of elasticity, where the state function is vector valued, is also considered. In both cases some examples are presented.
Characterization of the departure process from an ME/ME/1 queue
In this paper we propose a family of finite approximations for the departure process of an ME/ME/1 queue indexed by a parameter defined as the system size of the finite approximation. The approximations capture the interdeparture times from an ME/ME/1 queue exactly and preserve the lag correlations of inter-event times of the departures from an ME/ME/1 queue up to lag .
Characterization of the departure process from an ME/ME/1 queue
In this paper we propose a family of finite approximations for the departure process of an ME/ME/1 queue indexed by a parameter k defined as the system size of the finite approximation. The approximations capture the interdeparture times from an ME/ME/1 queue exactly and preserve the lag correlations of inter-event times of the departures from an ME/ME/1 queue up to lag (k - 1).
Characterization of the first operating period of a two-unit standby redundant system with three states of units
A two-unit cold-standby redundant system with one repair facility is considered. Each unit can be in three states: good (I), degraded (II), and failed (III). We suppose that only the following state-transitions af a unit are possible: . The paper is devoted to the problems which arise only provided that the units of the redundant system can be in more than two states (i.e. in operating and failed states). The following characteristics dealing with a single operating period of the system are studied...
Charge stationnaire d'une file d'attente à rejet. Application au cas indépendant
Charge stationnaire d'une file d'attente à rejet. Cas de plusieurs serveurs