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Available. Open Access. Open Access
Article
Publication date: 19 June 2024

Armindo Lobo, Paulo Sampaio and Paulo Novais

This study proposes a machine learning framework to predict customer complaints from production line tests in an automotive company's lot-release process, enhancing Quality 4.0…

796

Abstract

Purpose

This study proposes a machine learning framework to predict customer complaints from production line tests in an automotive company's lot-release process, enhancing Quality 4.0. It aims to design and implement the framework, compare different machine learning (ML) models and evaluate a non-sampling threshold-moving approach for adjusting prediction capabilities based on product requirements.

Design/methodology/approach

This study applies the Cross-Industry Standard Process for Data Mining (CRISP-DM) and four ML models to predict customer complaints from automotive production tests. It employs cost-sensitive and threshold-moving techniques to address data imbalance, with the F1-Score and Matthews correlation coefficient assessing model performance.

Findings

The framework effectively predicts customer complaint-related tests. XGBoost outperformed the other models with an F1-Score of 72.4% and a Matthews correlation coefficient of 75%. It improves the lot-release process and cost efficiency over heuristic methods.

Practical implications

The framework has been tested on real-world data and shows promising results in improving lot-release decisions and reducing complaints and costs. It enables companies to adjust predictive models by changing only the threshold, eliminating the need for retraining.

Originality/value

To the best of our knowledge, there is limited literature on using ML to predict customer complaints for the lot-release process in an automotive company. Our proposed framework integrates ML with a non-sampling approach, demonstrating its effectiveness in predicting complaints and reducing costs, fostering Quality 4.0.

Details

The TQM Journal, vol. 36 no. 9
Type: Research Article
ISSN: 1754-2731

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Book part
Publication date: 30 September 2021

Luisa Farah Schwartzman

Race scholars often refer to the colonization of Indigenous peoples in the Americas and the enslavement of Africans as a founding moment in the making of today's racial…

Abstract

Race scholars often refer to the colonization of Indigenous peoples in the Americas and the enslavement of Africans as a founding moment in the making of today's racial hierarchies. Yet their narrative of this initial moment often mischaracterizes early European states, erases Indigenous and African states, and naturalizes racial group belonging. Such practices are counterproductive to the antiracist project. Following the lead of decolonial scholarship, much recent work by historians has sought to recover and reconstruct the institutions, social structures, and agency of African and Indigenous peoples, as well as revisit assumptions about European power, institutions, and agency in their historical encounters with their continental “others.” I highlight the potential of this approach for sociologists of “race” by narrating two significant historical events in the making of the modern Atlantic world: the conquest of Tenochtitlán, the capital of the Aztec empire, and the transatlantic enslavement of subjects of the kingdoms of Kongo and Ndongo (in today's Angola) in the sixteenth and seventeenth centuries. I analyze how particular European, Indigenous, and African actors made decisions in the context of their own and others' historically situated and dynamic political and social structures. I read these historical events through the lens of decolonial scholarship, and sociological literatures on group-making, state formation, and the emergence of capitalism, to make sense of the violent social process that led to the breakup of African, Indigenous, and European political and social structures and the making of colonial and racially hierarchical social structures in the Atlantic world.

Details

Global Historical Sociology of Race and Racism
Type: Book
ISBN: 978-1-80117-219-6

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Expert briefing
Publication date: 14 October 2022

This follows the August 24 elections in which the ruling People's Movement for the Liberation of Angola (MPLA) won 51% of the vote, beating its main rival the National Union for…

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DOI: 10.1108/OXAN-DB273373

ISSN: 2633-304X

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Geographic
Topical
Available. Open Access. Open Access
Article
Publication date: 30 June 2022

Norita Ahmad and Arief M. Zulkifli

This study aims to provide a systematic review about the Internet of Things (IoT) and its impacts on happiness. It intends to serve as a platform for further research as it is…

3761

Abstract

Purpose

This study aims to provide a systematic review about the Internet of Things (IoT) and its impacts on happiness. It intends to serve as a platform for further research as it is sparse in in-depth analysis.

Design/methodology/approach

This systematic review initially observed 2,501 literary articles through the ScienceDirect and WorldCat search engines before narrowing it down to 72 articles based on subject matter relevance in the abstract and keywords. Accounting for duplicates between search engines, the count was reduced to 66 articles. To finally narrow down all the literature used in this systematic review, 66 articles were given a critical readthrough. The count was finally reduced to 53 total articles used in this systematic review.

Findings

This paper necessitates the claim that IoT will likely impact many aspects of our everyday lives. Through the literature observed, it was found that IoT will have some significant and positive impacts on people's welfare and lives. The unprecedented nature of IoTs impacts on society should warrant further research moving forward.

Research limitations/implications

While the literature presented in this systematic review shows that IoT can positively impact the perceived or explicit happiness of people, the amount of literature found to supplement this argument is still on the lower end. They also necessitate the need for both greater depth and variety in this field of research.

Practical implications

Since technology is already a pervasive element of most people’s contemporary lives, it stands to reason that the most important factors to consider will be in how we might benefit from IoT or, more notably, how IoT can enhance our levels of happiness. A significant implication is its ability to reduce the gap in happiness levels between urban and rural areas.

Originality/value

Currently, the literature directly tackling the quantification of IoTs perceived influence on happiness has yet to be truly discussed broadly. This systematic review serves as a starting point for further discussion in the subject matter. In addition, this paper may lead to a better understanding of the IoT technology and how we can best advance and adapt it to the benefits of the society.

Details

Digital Transformation and Society, vol. 1 no. 1
Type: Research Article
ISSN: 2755-0761

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Book part
Publication date: 22 August 2018

Molly C. Ball

Using archival and primary source evidence, this chapter introduces the first real wage series from 1891 to 1930 for Brazil’s most important immigrant and industrial city, São…

Abstract

Using archival and primary source evidence, this chapter introduces the first real wage series from 1891 to 1930 for Brazil’s most important immigrant and industrial city, São Paulo. This is the first price series, nominal wage series, and real wage series for the city that covers the duration of the Old Republic. While scholars look to Rio de Janeiro evidence to compare Brazil’s cost of living to other southern cone and immigrant-receiving countries, it is preferable to use evidence from the primary destination city. Price deviations between the two cities underscore the need for these series. The results show foodstuff prices increased steadily over the period and more dramatically in the period during and after World War I. Hedonic wage regressions show hourly wages for unskilled, low-skilled, and medium-skilled workers did not increase accordingly. While the decline in real wages tapered off in the 1920s, real wages across skill levels did not recover to prewar levels. This new index suggests the city of São Paulo’s labor market was more integrated with Buenos Aires’s than with Rio de Janeiro’s and that Paulistano real wages did not recover in the 1920s to the extent that they did in other southern cone cities. Given these results, the puzzle as to why migrants continued to flock to the city prove more intriguing. The results also suggest that Vargas-era labor legislation had the potential to greatly improve the lives of the city’s working class, perhaps more so than in other cities.

Details

Research in Economic History
Type: Book
ISBN: 978-1-78756-582-1

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Article
Publication date: 5 June 2020

Luana Lavagnoli Moreira, Rafael Rezende Novais, Dimaghi Schwamback and Salomão Martins de Carvalho Júnior

The most common methodology to estimate erosivity is using rainfall data obtained from rain monitoring stations. However, the quality of this estimation may be compromised due to…

153

Abstract

Purpose

The most common methodology to estimate erosivity is using rainfall data obtained from rain monitoring stations. However, the quality of this estimation may be compromised due to low density, operational problems and maintenance cost of rainfall monitoring stations, common problem encountered in developing countries such as Brazil. The objective of this study was to evaluate the applicability of pluviometric data obtained by TRMM satellite images for the spatiotemporal characterization of erosivity in the state of Espírito Santo (Brazil).

Design/methodology/approach

For this, rainfall data and annual and monthly erosivities of 71 rainfall stations were statistically compared with those from TRMM images.

Findings

For this, rainfall data and annual and monthly erosivities of 71 rainfall stations were statistically compared with those from TRMM images. The estimate proved that TRMM is efficient since the NSE values were higher than 0.70 and the coefficient of determination was higher than 0.77 for monthly and annual erosivities, but in most months and yearly, erosivity was overestimated.

Practical implications

The use of satellite images to estimate rainfall allowed the spatial representation over time (months) of the oscillating degree of erosivity in the state of Espírito Santo (Brazil). The spatialization may provide an identification of areas and periods in which are essential for the implementation of land use management in order to minimize environmental problems related to soil loss.

Originality/value

The technique applied may be an alternative to overcome common problems on rainfall monitoring station, such as low density, low data reliability, high manutention and maintenance cost and operational problems.

Details

World Journal of Science, Technology and Sustainable Development, vol. 17 no. 3
Type: Research Article
ISSN: 2042-5945

Keywords

Available. Open Access. Open Access
Article
Publication date: 14 September 2022

Paulo Duarte, Susana C. Silva, Marcelo Augusto Linardi and Beatriz Novais

Self-service check-out technologies (SSTs) are becoming a trend across different retail settings, allowing companies to gain efficiency and reduce costs. Nevertheless, the success…

10523

Abstract

Purpose

Self-service check-out technologies (SSTs) are becoming a trend across different retail settings, allowing companies to gain efficiency and reduce costs. Nevertheless, the success of SSTs implementation is still subject to challenges and uncertainties. This study aims to provide insights for theory and managers on the necessary conditions for the successful implementation of retail SSTs.

Design/methodology/approach

Based on an online survey, data from 251 participants were collected to understand the factors predicting SSTs adoption and realise what conditions are mandatory for the adoption. partial Least Squares Structural Equation Modelling (PLS-SEM) and necessary condition analysis (NCA) were used to analyse the data.

Findings

According to the NCA analysis results, 12 latent variables were relevant for predicting SSTs adoption, but only seven were necessary conditions for user adoption.

Originality/value

The complementarity of perspectives for understanding the adoption of SSTs based on the two data analysis techniques provides novel insights into theory and support for retailers' decision-making on self-service technologies (STTs) implementation.

Details

International Journal of Retail & Distribution Management, vol. 50 no. 13
Type: Research Article
ISSN: 0959-0552

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Article
Publication date: 17 February 2021

Amanda de Paula Aguiar-Barbosa, Adriana Fumi Chim-Miki and Metin Kozak

The objective of this study was to analyze the evolution of tourism competitiveness over the years, ascertaining the state of the art and the degree of consensus among scholars on…

675

Abstract

Purpose

The objective of this study was to analyze the evolution of tourism competitiveness over the years, ascertaining the state of the art and the degree of consensus among scholars on its constituent elements to propose an integrative and updated concept.

Design/methodology/approach

A set of 130 definitions on tourism competitiveness formulated between 1999–2018 was analyzed and segmented into three periods, allowing its historical evolution to be ascertained. It is a qualitative and quantitative exploratory research that uses a combination of techniques, namely, content analysis, analysis of co-words and consensus analysis.

Findings

The results indicated a low use of elements such as the quality of life and the environment in the authors' definitions during 1999–2018, although these elements were present in the first concept of tourism competitiveness by Crouch and Ritchie (1999, 2003). Another finding of this study shows a reduction in the analysis of tourism competitiveness based on the supply and demand side. Nowadays, the research tends to turn on the basis of the population directly affected. It also reveals the enrichment of the theoretical corpus with new lines of research arising and new groups of scholars of the subject, consequently a new frontier in tourism competitiveness.

Research limitations/implications

The authors recommend deepening the analysis in each category of conceptual elements of tourism competitiveness to identify the origins of the low consensus. The authors also suggest conducting further research on the largest invisible schools of thought on this subject to understand their relations and perspectives, and thus to advance in the theoretical streams of the field. Finally, it is imperative to develop research on new models and monitors of tourism competitiveness that meet its renewed concept and integrate dimensions to consider the perspective of supply, demand, tourists and residents, as well as not excluding the economic bias but including the social side.

Practical implications

Owing to the fact that monitors of tourism competitiveness have practically no variables related to the social, most of the surveys are carried out from the supply or demand perspective, leaving the resident distant from the process. In this way, the results allow authors to indicate that new models of competitiveness measurement should be formulated based on the vision of the community impacted by tourism, i.e. a new version of tourism competitiveness not based on productivity but rather on the social aspect.

Originality/value

The findings of this study contribute to the field literature by offering an integrative concept of tourism competitiveness based on the elements with a higher level of consensus among researchers. Furthermore, the results accentuate a worrying fact regarding the operationalization of this concept, as the theoretical basis is not expressed in the monitors of competitiveness. Thus, nor it is possible in the management of the tourism industry.

Details

International Journal of Tourism Cities, vol. 7 no. 2
Type: Research Article
ISSN: 2056-5607

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Article
Publication date: 23 October 2023

Germano Araujo Coelho, Fabiana da Cunha Saddi, Stephen Peckham, Mariana de Andrade da Silva, Jaqueline Damasceno Silva, Maria Luiza Pereira Barretos, Gabriela Rocha, Alexandra Novais, Cristiane Lopes Simão Lemos and Amélia Cohn

The study compares how distinct mechanisms that connect pre-established policy objectives to professionals' practices, and the health policy implementation context influenced…

82

Abstract

Purpose

The study compares how distinct mechanisms that connect pre-established policy objectives to professionals' practices, and the health policy implementation context influenced different approaches to frontline staff participation. The authors analysed 26 teams in six cities from two Brazilian states, during the last cycle of the National Program for Improving Access and Quality of Primary Care (PMAQ).

Design/methodology/approach

About 172 in-depth interviews were conducted with frontliners – community health workers (78), nurses (37), doctors (30) – and managers (27). Interview guides were based on key issues identified in the implementation and pay-for-performance (P4P) literature. Drawing on thematic analysis and synthesis of the literature, three types of participation mechanisms were identified: relational, motivational and incremental learning. They were analysed considering distinct contexts at the local level to understand how they influenced different forms of participation: mere adherence, result-oriented and transformative.

Findings

Administrations with stronger institutional organizational structures were able to control work processes and reduce professional discretion. However, sustained participation was more likely where there was greater integration between management and frontline health care teams. Motivation based only on financial incentives could not bring about transformative participation. This depended on the degree of professional's ideational motivation towards primary care. Finally, contexts with unfavourable working conditions tend to demotivate professionals, but incremental learning helps teams cope with these obstacles.

Originality/value

The study overcomes gaps in the literature in relation to PMAQ's implementation process. Overall, the study delves into which/how mechanisms alter frontliners participation in performance-oriented health programs.

Details

International Journal of Public Sector Management, vol. 36 no. 6/7
Type: Research Article
ISSN: 0951-3558

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Article
Publication date: 22 February 2011

Celeste Amorim Varum, Carla Melo, António Alvarenga and Paulo Soeiro de Carvalho

This paper seeks to discuss the process and results of a scenario exercise applied to the Portuguese tourism and hospitality industries with a 2020 horizon.

5282

Abstract

Purpose

This paper seeks to discuss the process and results of a scenario exercise applied to the Portuguese tourism and hospitality industries with a 2020 horizon.

Design/methodology/approach

Through an intuitive‐logical process adapted to the specific purposes of the research, four alternative scenarios of the evolution of the industry were developed. The exercise involved three workshops, with the participation of a group of experts, academics, representatives from industry and local government.

Findings

Based on the nature and dynamics of the key forces and trends, the four scenarios identified are: southern experience; global emotions; “sin surprise”; and non‐charming Portugal. In all scenarios there is increased global competition amongst tourist destinations. A desire for authenticity opens the opportunity for Portugal as a tourist destination but it also poses challenges for managers and policy makers. These scenarios are of practical use for managers, policy makers and other practitioners as they provide a framework for the development and assessment of robust strategies and policies, i.e. strategies that will survive several kinds of external development.

Originality/value

The paper contributes to the knowledge of scenario methods in practice and to help policy planners and managers recognize, consider and reflect on uncertainties they are likely to face. The work is also valuable for the international foresight community by discussing the method and addressing some drawbacks of the scenario exercise and recommendations for practice.

Details

Foresight, vol. 13 no. 1
Type: Research Article
ISSN: 1463-6689

Keywords

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