A production-recycling system is investigated. A constant demand can be satisfied with production and recycling. The used items are bought back and then recycled. The not recycled products are disposed off. It is analyzed two types of models. The first model examines the EOQ related costs and...

A dolgozat egy javítási és hulladékkezelési, reverz logisztikai problémát mutat be. Egy termék iránti keresletet termeléssel és visszaérkező, használt termékek javításával lehet kielégíteni. Arra a kérdésre keressük a választ, hogy a releváns költségek minimalizálása...

An integrated production–recycling system is investigated. A constant demand can be satisfied by production and recycling. The used items might be bought back and then recycled. The not recycled products are disposed off. Two types of models are analyzed. The first model examines and minimizes...

Deterministic EOQ-type two-store reverse logistics systems was studied extensively in the literature. All this proposition assumed a predetermined control system and searched the optimal parameters for this control systems. There are no results regarding the structure of optimal policies. The...

The aim of the paper is to investigate a reverse logistics model. Schrady (1967) has examined a model with two stores, where the returned items are repaired then used as new one. The not repairable items are disposed of and the required products are procured. The author has analyzed the model...

The aim of the paper is to investigate the model of Richter (1996). The model examines a reverse logistics problem. The proposed inventory holding policy in this model was predetermined. We will show that the proposed predetermined policy is optimal, as well. ; Richter (1996) egy két műhelyes...

A cikk a szennyezési jogok bevezetését vizsgálja a mikroökonómia standard vállalatára. Komparatív statikai vizsgáljuk, a termelő vállalat lehetséges reakcióit, amely a technológia változatlanul hagyása, vagy megváltoztatása lehet. Az egyes esetekben arra keresünk választ,...

Despite known simplifications the input-output analysis is an effective tool to investigate the environmental impacts of the producing economy on the natural environment. The emission of pollutants is introduced direct in the model studied as joint products of the process of production. The...

In this paper we study a generalisation of the dynamic Leontief input-output model. We extend the standard dynamic Leontief model with the balance equation of non-renewable resources. Obviously the non-renewable stocks will decrease exploiting primary resources. In this study we examine the...

In this paper we investigate disposal activities in a reverse logistics models with linear costs structure. The two models have different disposal strategy. The first model analyzes a continuous disposal strategy, i.e. disposal can happen in every time in the planning horizon. This type of...