Impact of environmental concerns on the capacity-pricing problem in the car rental business

Redefinition of a mathematical model implemented to solve the problem of capacity-pricing in car rental. To this model, environmental aspects were studied and added in order to study their influence on the results of that same model. In order to optimize this multi objective function some methodologies are applied such as a weighted sum or the epsilon constraint

A concise guide to existing and emerging vehicle routing problem variants

Vehicle routing problems have been the focus of extensive research over the past sixty years, driven by their economic importance and their theoretical interest. The diversity of applications has motivated the study of a myriad of problem variants with different attributes. In this article, we provide a concise overview of existing and emerging problem variants. Models are typically refined along three lines: considering more relevant objectives and performance metrics, integrating vehicle routing evaluations with other tactical decisions, and capturing fine-grained yet essential aspects of modern supply chains. We organize the main problem attributes within this structured framework. We discuss recent research directions and pinpoint current shortcomings, recent successes, and emerging challenges

Operational Research: Methods and Applications

Throughout its history, Operational Research has evolved to include a variety of methods, models and algorithms that have been applied to a diverse and wide range of contexts. This encyclopedic article consists of two main sections: methods and applications. The first aims to summarise the up-to-date knowledge and provide an overview of the state-of-the-art methods and key developments in the various subdomains of the field. The second offers a wide-ranging list of areas where Operational Research has been applied. The article is meant to be read in a nonlinear fashion. It should be used as a point of reference or first-port-of-call for a diverse pool of readers: academics, researchers, students, and practitioners. The entries within the methods and applications sections are presented in alphabetical order. The authors dedicate this paper to the 2023 Turkey/Syria earthquake victims. We sincerely hope that advances in OR will play a role towards minimising the pain and suffering caused by this and future catastrophes

Operational research:methods and applications

Throughout its history, Operational Research has evolved to include a variety of methods, models and algorithms that have been applied to a diverse and wide range of contexts. This encyclopedic article consists of two main sections: methods and applications. The first aims to summarise the up-to-date knowledge and provide an overview of the state-of-the-art methods and key developments in the various subdomains of the field. The second offers a wide-ranging list of areas where Operational Research has been applied. The article is meant to be read in a nonlinear fashion. It should be used as a point of reference or first-port-of-call for a diverse pool of readers: academics, researchers, students, and practitioners. The entries within the methods and applications sections are presented in alphabetical order

Transformational leadership influences on organisational justice and employee commitment in a customer service organisation

Orientation: Organisations are facing several challenges pertaining to effective leadership, fairness and loyalty of employees. The moderating influence of transformational leadership (TL) on the relationship between justice and employee commitment is still largely unknown and needs to be explored further, especially within the customer service industry. Research purpose: The aim of this study was to determine the relationship between organisational justice and employee commitment and to examine the moderating effect of TL on the relationship between organisational justice and employee commitment in a customer service organisation. Motivation for the study: The research setting of this study is a customer service organisation. This organisation calls for a role model leadership approach, such as TL, to create a just, fair workplace and ultimately increase the level of employee commitment. Research approach/design and method: A quantitative cross-sectional survey design was used to collect the data from a sample of 111 permanently employed staff in a South African customer service organisation. Main findings: The findings indicate that TL had a significant positive relationship with organisational justice and employee commitment. Furthermore, the results indicate that TL moderated the relationship between organisational justice and employee commitment. Practical/managerial implications: The findings showed that TL could be vital as an effective leadership approach that can enhance justice perceptions and psychological attachment in the workplace. Contribution/value-add: This study contributes to the theoretical debate on TL, workplace fairness and psychological attachment by providing empirical support on the effect of TL on the relationship between justice and commitment perceptions

Incorporating declared capacity uncertainty in optimizing airport slot allocation

Slot allocation is the mechanism used to allocate capacity at congested airports. A number of models have been introduced in the literature aiming to produce airport schedules that optimize the allocation of slot requests to the available airport capacity. A critical parameter affecting the outcome of the slot allocation process is the airport’s declared capacity. Existing airport slot allocation models treat declared capacity as an exogenously defined deterministic parameter. In this presentation we propose a new robust optimization formulation based on the concept of stability radius. The proposed formulation considers endogenously the airport’s declared capacity and expresses it as a function of its throughput. We present results from the application of the proposed approach to a congested airport and we discuss the trade-off between the declared capacity of the airport and the efficiency of the slot allocation process