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Optimal lot size determination of multistage production system

Jindřich L. Klapka (1978)

Aplikace matematiky

This paper deals with the optimization of total setup plus inventory cost of a certain class of the multistage inventory-production systems with the series arranged production stages having generally different production rates, separated by stores from each other. The optimization is made by the choice of lot sizes across an infinite time horizon. The exact cost-optimization algorithm based on the Bellman optimality principle is derived and applied for deriving two lower bounds of the optimal cost...

Optimization of an SMD placement machine and flows in parametric networks

Katarína Cechlárová, Tamás Fleiner (2011)

Kybernetika

In the minimization of the number of subtours made by the insertion head of an SMD placement machine a variant of the network flow problem arose. In a network with n vertices and m arcs a set F of arcs (parametrized arcs) is given. The task is to find a flow of a given size such that the maximum of flow values along the arcs from F is minimized. This problem can be solved by a sequence of maximum flow computations in modified networks where the capacities of the parametrized arcs are successively...

Planificación multinivel con limitaciones de capacidad.

Sebastián Lozano Segura, Juan Carlos Larrañeta Astola, Luis Onieva Jiménez (1991)

Qüestiió

Este trabajo estudia el problema de la planificación de la producción en sistemas de fabricación multinivel, con un cuello de botella. El problema se ha abordado mediante una aproximación heurística, resolviendo el problema resultante empleando el método primal dual. El trabajo incluye un algoritmo para la selección sucesiva de los precios de los recursos que garanticen una mejora monótona hacia la solución óptima.

Process parameter prediction via markov models of sub-activities

Lino G. Marujo, Raad Y. Qassim (2014)

RAIRO - Operations Research - Recherche Opérationnelle

This work aims to fill a lacunae in the project-oriented production systems literature providing a formal analytic description of the rework effects formulae and the determination of the extended design time due to a certain degree of overlapping in a pair of activities. It is made through the utilization of concepts of workflow construction with hidden (semi) Markov models theory and establishing a way to disaggregate activities into sub-activities, in order to determine the activity parameters...

Production planning in data envelopment analysis without explicit inputs

Alireza Amirteimoori, Behrooz Daneshian, Sohrab Kordrostami, Kambiz Shahroodi (2013)

RAIRO - Operations Research - Recherche Opérationnelle

In the performance measurement using tools such as data envelopment analysis (DEA), data without explicit inputs has attracted considerable attention among researchers. In such studies the problem of production planning in the next production season is an important and interesting subject. Because of the uncertain nature of the future, decision makers need to provide robust procedures in order to examine alternative courses of action and their implications. The purpose of this paper is to develop...

Production-inventory system with finite production rate, stock-dependent demand, and variable holding cost

Hesham K. Alfares (2014)

RAIRO - Operations Research - Recherche Opérationnelle

In general, traditional production-inventory systems are based on a number of simplifying – but somewhat unrealistic – assumptions, including constant demand rate, constant holding cost, and instantaneous order replenishment. These assumptions have been individually challenged in numerous variations of production-inventory models. Finite production rate models, such as economic production quantity (EPQ) systems consider gradual order replenishment. Stock-dependent demand models assume the demand...

Reconfigurable Dynamic Cellular Manufacturing System: A New Bi-Objective Mathematical Model

Masoud Rabbani, Mehran Samavati, Mohammad Sadegh Ziaee, Hamed Rafiei (2014)

RAIRO - Operations Research - Recherche Opérationnelle

Dynamic Cell Formation Problem (DCFP) seeks to cope with variation in part mix and demands using machine relocation, replication, and removing; whilst from practical point of view it is too hard to move machines between cells or invest on machine replication. To cope with this deficiency, this paper addresses Reconfigurable Dynamic Cell Formation Problem (RDCFP) in which machine modification is conducted instead of their relocation or replication in order to enhance machine capabilities to process...

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