Rafael Caballero

Rafael Caballero
University of Malaga | UMA · Department of Applied Economics (Mathematics)

About

193
Publications
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3,475
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Publications

Publications (193)
Article
Full-text available
Purpose-This study aims to present diverse proposals for the measurement of tourism destination competitiveness that serve as alternatives to the travel and tourism competitiveness index (TTCI). Design/methodology/approach-The proposal includes principal component analysis, the DP2-distance method, goal programming, data envelopment analysis and th...
Article
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Promoting healthy lifestyles is nowadays a public priority among most public entities. The ability to design an array of nutritious and appealing diets is very valuable. Menu Planning still presents a challenge which complexity derives from the problems’ many dimensions and the idiosyncrasies of human behavior towards eating. Among the difficulties...
Article
Full-text available
Last reviews show how the Spanish consumption patterns have become away from the Mediterranean diet, traditionally consumed in Spain and widely supported by the nutritional expert community. Hence, the aim of this study is to explore and provide different alternatives to the current Spanish diet. The idea is to obtain a set of palatable diets fulfi...
Poster
Full-text available
En el presente estudio propone un índice para medir la competitividad de los destinos turísticos en la región del Caribe creado a partir de la Programación por Metas y su combinación con el Análisis Envolvente de Datos. El propósito de la aplicación es suplir la ausencia de los destinos caribeños en los rankings internacionales y analizar la posibi...
Article
Improving the eco-efficiency of municipalities in the provision of municipal solid waste (MSW) services is fundamental in the context of a circular economy. This study evaluates the eco-efficiency of a sample of Spanish municipalities, integrating the total cost as input, recyclable waste as desirable output, and unsorted waste as undesirable outpu...
Article
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The aim of this work is to design a multiobjective model to explain the behavior among military expenditures (MEs), the human development index, and the global peace index in countries belonging to the North Atlantic Treaty Organization (NATO) for the study period 2008–2016. In order to solve this problem, different decision variables have been con...
Article
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The assessment of wastewater treatment plant (WWTP) performance has gained the interest of water utilities and water regulators. Eco-efficiency has been identified as a powerful indicator, as it integrates economic and environmental variables into a single index. Most previous studies have employed traditional data envelopment analysis (DEA) for th...
Article
This paper presents a system of Sustainable Tourism Tags to evaluate the management of tourist destinations, using the information from a composite indicator called the Differential Dynamic Index. This vectorial indicator has two components: one dynamic which shows the advance or regress in time of each destination in terms of sustainability; the o...
Article
In the last few years, the application of decision making to logistic problems has become crucial for public and private organizations. Efficient decisions clearly contribute to improve operational aspects such as cost reduction or service improvement. The particular case of waste collection service considered in this paper involves a set of econom...
Article
It is essential to assess the productivity of wastewater treatment plants (WWTPs)to improve their economic and technical performance over time. In doing so, reliable indexes should be used to avoid biased conclusions leading to unsuccessful policy and managerial measures. Ratio-based indexes are typically employed, but are infeasible when any of th...
Article
Real-world situations often result in optimization problems with conflicting objectives for which the search space is constrained by several factors. In particular, performing an effective solution brings quantifiable benefits to companies in charge of the waste collection in urban areas, which are currently investing time and effort to improve the...
Article
This study proposes to evaluate the sustainability of water companies through time by using a new approach, one that involves a dynamic synthetic indicator derived from goal programming techniques. This dynamic indicator approach incorporates catch-up and innovation indices, which enables one to identify the main factors that drive changes in susta...
Article
Eco-efficiency assessment is a useful tool for improving the sustainability of wastewater treatment plants (WWTPs). However, it is a complex task that requires the integration of several performance indicators into a single index. Data envelopment analysis (DEA) is established as a highly effective methodology for achieving this as it permits the i...
Article
Full-text available
Nowadays the traffic congestion is being a common problem in major cities, every time the travel time is increasing and also the number of private cars. It is urgent to take actions to solve this problem. The urban transport is becoming into the best way to fight against congestion; but to make it more attractive to users it has to be more efficien...
Article
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The problem of project portfolio selection consists in allocating resources (for instance money) to a set of proposals optimizing certain impact measures [Litvinchev et al. (J Comput Syst Sci Int 50(6):942–952, 2011)]. We develop a model that takes into account the following characteristics: projects tasks; different resources allocation policies;...
Article
Improving eco-efficiency of wastewater treatment plants (WWTPs) has been identified as being essential for achieving urban sustainability. Several previous papers have evaluated the eco-efficiency of WWTPs using data envelopment analysis (DEA) models. However, those models provided only a static assessment in that they ignored possible fluctuations...
Article
Full-text available
This paper addresses frequent and foreseeable floods in the short-term preparedness of an imminent event using a multicriteria optimization model integrated with a geographical information system to simulate flood levels, determine the best strategies, and update information. The proposed model takes into account the four main relief operations: lo...
Article
How to assess sustainable tourism is a critical issue. Many static sustainability measures have been proposed in the literature, however new dynamic methods are needed to grade the course towards the target of sustainable tourism. In this context, this paper presents a vectorial composite indicator, called Differential Dynamic Index (DDI), that is...
Article
Currently, water and sewer companies face the challenge of improving their quality of service to customers (QSC). Performance indicators are essential to monitor and benchmark the QSC of water companies; however, individual indicators do not provide a holistic evaluation of the quality of water and sewer services provided to customers. This study p...
Article
Selecting a project portfolio is a complex process involving many factors and considerations from the time it is proposed to the time the project portfolio is finally selected. Given that making a good selection is of crucial importance, it is essential to develop well-founded mathematical models to lead the organization to its final goal. To achie...
Article
Benchmarking the performance of wastewater treatment plants (WWTPs) is essential for promoting their long-term sustainability. Recent research has applied data envelopment analysis (DEA) models to evaluate the efficiency of WWTPs providing a synthetic index of their performance. However, the traditional DEA is a deterministic method; therefore, reg...
Article
Full-text available
The urban transport planning process has four main activities: Network design, Timetable construction, Vehicle scheduling and Crew scheduling; each activity has subactivities. In this paper the authors work with the subactivities of timetable construction: minimal frequency calculation and departure time scheduling. The authors propose to solve bot...
Article
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The aim of this research consists of measuring the sustainability degree for tourism destinations considering the stakeholder's preferences. Their opinions were included in the overall process during the choice of the initial indicators and determining the weights. Additionally, in the aggregation process, a sustainability index was calculated with...
Article
Full-text available
Tourism sustainability evaluation has become an important issue in the development of this economic industry due to its dependence on natural environment quality and social acceptance. The study shows different ways to measure sustainability by means of composite indicators obtained from an initial set of quantitative and qualitative information. T...
Article
Improving the performance of wastewater treatment plants is essential to ensuring their long-term sustainability. Most of the previous studies on this topic have assessed the techno-economic efficiency of wastewater treatment plants and ignored the emission of greenhouse gases. For the first time, the weighted Russell directional distance model was...
Article
This paper introduces an approach to assessing the sustainability of tourism that takes into account the progress made towards greater sustainability, as well as the current level of sustainability. The Vectorial Dynamic Composite Indicator is based on the goal programming technique. This composite indicator has two components (static and dynamic)....
Article
Performance indicators (PIs) are essential in the benchmarking process used to rate and rank water companies. However, a set of individual PIs does not provide a holistic assessment of company performance from multiple perspectives. A multidimensional evaluation of the performance of water companies can be achieved by aggregating the PIs into a syn...
Article
The selection of the most appropriate wastewater treatment (WWT) technology is a complex problem since many alternatives are available and many criteria are involved in the decision-making process. To deal with this challenge, the analytic network process (ANP) is applied for the first time to rank a set of seven WWT technology set-ups for secondar...
Article
While the cross entropy methodology has been applied to a fair number of combinatorial optimization problems with a single objective, its adaptation to multiobjective optimization has been sporadic. We develop a multiobjective optimization cross entropy (MOCE) procedure for combinatorial optimization problems for which there is a linear relaxation...
Article
The aim of this paper is to solve a real-world problem proposed by an international company operating in Spain and modeled as a variant of the Open Vehicle Routing Problem in which the makespan, i.e., the maximum time spent on the vehicle by one person, must be minimized. A competitive multi-start algorithm, able to obtain high quality solutions wi...
Article
This paper presents a new forest harvest scheduling model taking into account four conflicting objectives. The economic factor of timber production is considered and also aspects related to environmental protection. We also incorporate adjacency constraints to limit the maximum contiguous area where clear-cutting can be applied. The model proposed...
Article
Full-text available
The main objective of this paper consists in building a composite indicator that allows measuring the sustainability of tourist destinations starting from quantitative indicators, representative of sustainable tourism concept. The proposal is made by the combination of Goal Programming (GP) and Data Envelopment Analysis (DEA), in such a way as to a...
Article
Full-text available
The assessment of the sustainability of wastewater treatment (WWT) systems has gained interest in recent years. However, most previous studies have focused on environmental and/or economic dimensions ignoring social aspects. Moreover, they tend to be based on sets of indicators rather than providing a holistic assessment. To overcome this limitatio...
Conference Paper
Full-text available
an transport planning process has four basic activities: network design, timetable construction, vehicle scheduling and crew scheduling. In this work we focus on the urban bus timetable construction problem which has two sub-activities: bus frequency calculation and bus departures setting. Typically, these sub-activities are done sequentially, wh...
Conference Paper
Full-text available
The need for quantitative information in tourism planning processes on sustainability goals is now a widely accepted issue. Indicators of sustainable tourism have emerged as one of the tools of most practical potential in this field, both for the planner to the sector agents. However, much of the existing proposals in this area used indicators to...
Article
Full-text available
The process of urban public transportation planning commonly include four basic activities usu-ally executed sequentially: Network design, Timetabling, Vehicle scheduling and Crew scheduling. In this work we present a fuzzy integrated model for the minimum frequency and the timetabling construction. The main scientific contribution of this paper is...
Article
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The conceptualization of Total Economic Value (TEV) associated with protected natural areas necessarily requires an analytical reordering that ensures a simultaneous incorporation of natural, social and economic components. Based on this purpose, the present paper uses a multi-criteria decision modeling for the economic valuation of environmental g...
Article
Full-text available
El presente estudio tiene como objetivo crear un indicador sintético para medir la sostenibilidad de los destinos turísticos a partir de indicadores cuantitativos, representativos del concepto de desarrollo sostenible del turismo. La propuesta se confecciona mediante la combinación de la Programación por Metas (GP) y el Análisis Envolvente de Datos...
Article
The implementation of the Directive 91/271/eec has involved a significant increase in the number of wastewater treatment plants (wwTPs). Hence, the assessment of their efficiency, as a tool to save operational costs, has awakened increasing interest. Nevertheless, the traditional assessment of the efficiency only allows comparing homogeneous units...
Article
In this work we consider a Transportation Location Routing Problem (TLRP) that can be seen as an extension of the two stage Location Routing Problem, in which the first stage corresponds to a transportation problem with truck capacity. Two objectives are considered in this research, reduction of distribution cost and balance of workloads for driver...
Article
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The economic assessment of environmental goods and services constitutes an important contribution of economics in the incorporation of environmental issues into their theoretical founding, where their conceptualization about the economic value shows the viability of economic perception associated to the decision making process in natural areas. The...
Conference Paper
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Os processos de valoração econômica de bens e serviços ambientais incorporam novas concepções e metodologias em sua conceituação sobre o valor econômico no espaço natural, medição e avaliação das mudanças associadas ao bem estar do indivíduo, o qual demonstra sua viabilidade para o processo de tomada de decisão associada aos recursos naturais. Nest...
Article
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The min-max vehicle routing problem VRP is a variant of the classical VRP in which the objective is to minimize the duration of the longest route. Examination of the VRP literature indicates that the min-max VRP has received less attention than other variants have over the years. However, the problem has important practical applications, such as th...
Article
Full-text available
The process of urban public transportation planning commonly include four basic activities usually executed in sequence: Network design, Timetabling, Vehicle scheduling and Crew schedul-ing. In this work we present an integrated model for the minimum frequency and timetabling. We use two metaheuristics to solve it. The main cientific contribution o...
Article
This exploration work has as main objective assessment (ranking) of agency management service operators of water supply and sanitation (OOSAPyS) of Mexico City. Here applied the method called Analytic Hierarchy Process (AHP) to a system of thirty two indicators framed in three different categories: social, environmental and economic, was applied in...
Chapter
En este capítulo queremos mostrar el potencial de los sistemas de indicadores y de los indicadores sintéticos para evaluar la sostenibilidad de los destinos de turismo rural. La información que proporcionan estos instrumentos permite a los gestores turísticos diseñar estrategias de actuación necesarias para corregir las debilidades del destino y po...
Conference Paper
La valoración económica de bienes y servicios ambientales constituye un importante reto para la ciencia económica en busca de un reordenamiento en la concepción acerca del valor económico asociado a los espacios naturales. Por tal motivo, el objetivo general de este trabajo consiste en diseñar las bases teórico metodológicas para la valoración econ...
Article
The tourism sector has evolved in recent times, with a transformation in tourists’ preferences and behaviour. They are increasingly abandoning standard tours in favour of more personalised options. New technologies offer easy access to a large amount of tourism information. However, this also means it is difficult for a decision-maker to assess all...
Conference Paper
Full-text available
Vehicle Routing Problems (VRP) arise in transportation problems optimizing one or several objectives in conflict. We will focus on Open Vehicle Routing Problems with a homogeneous fleet and three objectives (total distance, maximum travel time and number of routes). We propose a multiobjective local search based algorithm capable of obtaining effic...
Article
Full-text available
The environmental economic valuation of natural resources represents an important mechanism to get an improvement in the natural resources management. In the case of protected areas, the using of a multicriteria modeling as a tool for the economic valuation of Environmental Goods and Services, constitutes an useful tool that provides the incorporat...
Conference Paper
Full-text available
The economic valuation of environmental goods and services demand, as a necessity, a deep change in the conception about the economic value associated to the natural spaces that guarantee the integration of their natural, social and economic components. That´s why, the present investigation offers a multicriteria modelling starting from methods lik...
Chapter
The processes of economic valuation of Environmental Goods and Services (EGS) include new conceptions or methodologies in their conceptualization about the economic value in the natural space, measuring and evaluation of the associate changes in the individual's social welfare, which demonstrates their viability for the decisions making process ass...
Chapter
En la actualidad el turismo se presenta como alternativa de desarrollo para muchas economías, producto de lo cual constituye una de las actividades económicas de mayor crecimiento en los últimos años. A pesar de sus reconocidas ventajas, provoca afectaciones al entorno donde tiene lugar, producto de lo cual se han diseñado instrumentos para garanti...
Conference Paper
A lot of multicriteria modelling methods are based on relative importance valuations from several criteria given by expert groups, which should be aggregated to obtain weights as a final result. The present investigation gives a modelling for the economic valuation of Environmental Goods and Services (EGS) in Viñales National Park by means of multi...
Article
In recent years we have observed a tendency to define models of tourism based on diversity, quality and sustainability. These parameters influence how tourism destinations are managed, with the involvement of local agents being essential to ensure the implementation of appropriate strategies for a specific location or region. As a result the manage...
Article
In this work, we develop an integer 0-1 programming model in order to select and plan, simultaneously, a project portfolio from a set of initial candidates. Projects can start at different times depending on resource availability or any other strategic or political requirements. We assume the decision centre has an imprecise knowledge about certain...
Article
This paper proposes an indicators system to analyse the sustainability of tourist activity at rural destinations in countries with a consolidated tourism sector. The proposed system aims at providing tourist managers and policy-makers with information to better understand the transition to sustainability at specific destinations and to encourage th...
Article
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We propose a hybrid heuristic procedure based on scatter search and tabu search for the problem of clustering objects to optimize multiple criteria. Our goal is to search for good approximations of the efficient frontier for this class of problems and provide a means for improving decision making in multiple application areas. Our procedure can be...
Article
This work presents a nonlinear goal programming model with binary variables used to plan the management of a tree plantation, taking economic and environmental objectives into account. The aims are to stay within the limits of a given harvesting volume, limit the age of basic units targeted for clearcutting, obtain a forest with a balanced age dist...
Conference Paper
Declarative debugging is a debugging technique that abstracts the execution details that in general may be difficult to follow in declarative languages to focus on results. It relies on a data structure representing the wrong computation, the debugging tree, which is traversed by asking questions to the user about the correctness of the computation...
Article
1 Abstract In this paper, we deal with the problem of handling solutions in an external archive with the use of a relaxed form of Pareto dominance called -dominance and a variation of it called pa-dominance. These two relaxed forms of Pareto dominance have been used as archiving strategies in some multi-objective evolutionary algorithms (MOEAs). Th...
Article
The non-aggregative approach used by Eurostat to measure social exclusion, based on several indicators, makes the diagnosis difficult. Therefore, in this paper several synthetic indicators have been used, according to different methodologies in the aggregation process (based on statistics, such as Distance to Principal Components, or non statistica...
Article
Full-text available
There is renewed interest in the development of effective and efficient methods for optimizing models of which the optimizer has no structural knowledge. This is what in the literature is referred to as optimization of black boxes. In particular, we address the challenge of optimizing expensive black boxes, that is, those that require a significant...
Chapter
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In the field of single-objective optimization, hybrid variants of gradient based methods and evolutionary algorithms have been shown to performance better than the pure evolutionary method. This same idea has been used with Evolutionary Multiobjective Optimization (EMO), obtaining also very promising results. In most of the cases, gradient informat...