• Measuring the lean readiness of Kuwaiti manufacturing industries.

      Al-Najem, Mohammed; Garza-Reyes, Jose Arturo; ElMelegy, Ahmed; Gulf University for Science and Technology; University of Derby (Inderscience, 2018-10-04)
      The purpose of this paper is to measure the readiness of the Kuwaiti small and medium sized manufacturing industries to implement the lean system through an evaluation of their existing quality practices, and compare such readiness among different product sectors and ownership types. This study adopts the measurement framework developed by Al-Najem et al. (2013), which establishes six constructs related to lean quality practices, namely: process, planning and control, customer relations, suppliers relations, HR, and top management and leadership. Data were collected from a survey of 50 Kuwaiti small and medium sized manufacturing industries operating in different industrial sectors. One research question and two hypotheses were developed and tested using t-test and Levene’s test, descriptive analysis, and one-way ANOVA. The results demonstrate that the Kuwaiti small and medium sized manufacturing industries are far from being ready to implement lean. In addition, the study found that product sector and ownership type have no significant impact on the lean readiness in the Kuwaiti small and medium sized manufacturing industries. This research provides insight into preparing Kuwaiti, and other small and medium sized manufacturing industries, to implement the lean system by creating an assessment of their existing lean practices and lean readiness. This research is among a limited number of studies that have addressed lean within the Arab region, and only the second to examine the level of lean readiness of the Kuwaiti small and medium sized manufacturing industries. It expands the literature on lean in developing countries, particularly in the Arab region, and can provide guidance to research within other countries in the region.
    • Measuring the level of lean readiness of the Hong Kong's manufacturing industry

      Garza-Reyes, Jose Arturo; Wong, Kam-Kuen; Lim, Ming K.; Kumar, Vikas; The University of Derby (2016-06)
      Increasingly competitive business environments have forced manufacturing organisations to continuously seek improvements in their production processes as an alternative to achieve operational excellence. Lean manufacturing principles and techniques based on the elimination waste have been widely used by manufacturing organisations around the world to drive such improvements. The purpose of this paper is to present an empirical study that evaluates the readiness level of the Hong Kong’s manufacturing industry to provide a foundation for the successful implementation and/or sustainment of lean practices. To conduct this study, the paper adapts an assessment framework developed by Al-Najem et al. [16]. Thus, the lean readiness assessment is based on six quality practices (i.e. planning & control; processes; human resources; customer relations; supplier relations; and top management & leadership) related to lean manufacturing. One research question and three hypotheses were formulated and tested using a combination of inferential statics (i.e. Levene’s test and t-test) and descriptive statistics. Data were collected through a survey questionnaire responded by 9 manufacturing organisations with operations in Hong Kong. The findings suggest that the Hong Kong’s manufacturing organisations surveyed do not currently have a well-developed foundation to implement or sustain lean manufacturing. In particular, these organisations present important opportunities to further develop some quality practices such as processes, planning & control, customer relations, supplier relations, human resources, and top management & leadership. The improvement of these quality practices will ensure, according to Al-Najem et al.’s [16] framework, a more effective implementation and sustainment of lean manufacturing in their operations.
    • A multi-agent architecture for outsourcing SMEs manufacturing supply chain.

      Kumari, Sushma; Singh, Akshit; Mishra, Nishikant; Garza-Reyes, Jose Arturo; Aberystwyth University; University of Derby (Elsevier, 2015-01-31)
      In the present, global and competitive market customer's demands are very volatile. It is very difficult for small and medium size enterprises (SMEs) to satisfy their customer with quality product in reasonable price. Large firms are spending huge amount of their budget in generating technology development. To cope with this competitive market, usually, SMEs concentrate on their core expertise and outsource some non-core items or activities. The outsourcing decision (when, what, whom) is very crucial for small-scale industries. Realizing this scenario, in this article, an automated self-adaptive multi-agent system has been proposed. The proposed system will help SMEs to take an appropriate decision to mitigate the uncertainty in supply chain. The developed system exploits the “Outsourcing of operations” feature by its agents to conclude the manufacturing processes faster and reduce the idle time of certain machines with less human intervention. The communication protocol for agents has been described to give an insight of their communication. It was explained how various agents like outsourcing, material planning and supplier selection will come into action at different stages and take appropriate outsourcing decisions. Therefore, this multi-agent architecture will facilitate small scale manufacturing industries to execute their manufacturing processes and complex logistics issues efficiently. The execution of proposed architecture has been described in the simulated case study.
    • A multi-objective linear optimization model for designing sustainable closed-loop agricultural supply chain

      Reyhani Yamchi, Hossein; Jabarzadeh, Younis; Ghaffarinasab, Nader; Kumar, Vikas; Garza-Reyes, J.A.; University of Tabriz, Tabriz, Iran; University of the West of England; University of Derby (IEOM Society, 2020-03)
      Demand for agricultural products will grow by nearly 70 percent in 2050 and high volume of chemical pesticides and agricultural fertilizers along with considerable waste in this sector induces serious environmental concerns. Hence it is not a priority but a necessity to modify unsustainable procedures to make them sustainable. The aim of this study is developing and analyzing a multi-objective (MO) linear mathematical model for sustainable close-loop agricultural supply chain (CLASC) with a deteriorating product to determine (1) the optimal flow to every echelon and (2) the optimal location of some facilities to achieve three objectives: reducing costs and carbon dioxide (CO2) emissions throughout the proposed supply chain (SC) network, and increasing the responsiveness. Finally, a numerical example is used to evaluate the optimization model.
    • A new perspective of e-trust in the era of social media: Insights from customer satisfaction data

      Ramanathan, U; Williams, N.L.; Zhang, M; Sa-nguanjin, P; Garza-Reyes, J.A.; Borges, L.A.; Nottingham Trent University; University of Portsmouth; Global University Systems, 30 Holborn, London; University of Derby; et al. (IEEE, 2020-05-20)
      In this era of social media, products and services are sold globally using a few simple clicks online. In such online purchases, trust and familiarity are considered two important driving forces of consumer decision making. While online sales advocate high levels of flexibility and choices for consumers, they also hold the online service provider responsible for ensuring the security of the online user’s data. Using a Structural Equation Model (SEM) with data collected from the online service industry, we test the direct effects of ‘social media-induced purchase intention’ on customer satisfaction. We also test the mediating role of e-commerce/online sales (e-advertisement, e-safety and e-information) on customer satisfaction. In addition to social media advertising and information sharing, we find that a new factor – ‘e-safety’ – mediates the relationship between customer purchase intention and customer satisfaction. Our analysis indicates that online e-trust can be established between the customer and the service company when online purchases are made. At the same time, the quality of online information and e-safety of online payments make the service company trustworthy for future purchases. We relate data analysis directly to managerial decision making to avoid any delay in online customer services in the era of social media.
    • Nexus of circular economy and sustainable performance in the era of digitalization

      Agrawal, Rohit; Wankhede, Vishal Ashok; Kumar, Anil; Upadhyay, Arvind; Garza-Reyes, Jose Arturo; National Institute of Technology Tiruchirappalli, Tiruchirappalli, India; Pandit Deendayal Energy University, Gandhinagar, India; London Metropolitan University; University of Brighton; University of Derby (Emerald, 2021-04-01)
      This study aims to conduct a comprehensive review and network-based analysis by exploring future research directions in the nexus of circular economy (CE) and sustainable business performance (SBP) in the context of digitalization. A systematic literature review methodology was adopted to present the review in the field of CE and SBP in the era of digitalization. WOS and SCOPUS databases were considered in the study to identify and select the articles. The bibliometric study was carried out to analyze the significant contributions made by authors, various journal sources, countries and different universities in the field of CE and SBP in the era of digitalization. Further, network analysis is carried out to analyze the collaboration among authors from different countries. The study revealed that digitalization could be a great help in developing sustainable circular products. Moreover, the customers' involvement is necessary for creating innovative sustainable circular products using digitalization. A move toward the product-service system was suggested to accelerate the transformation toward CE and digitalization. The paper discusses digitalization and CE practices' adoption to enhance the SP of the firms. This work's unique contribution is the systematic literature analysis and bibliometric study to explore future research directions in the nexus of CE and SP in the context of digitalization. The present study has been one of the first efforts to examine the literature of CE and SBP integration from a digitalization perspective along with bibliometric analysis.
    • A Novel Location-Inventory-Routing Problem in a Two-Stage Red Meat Supply Chain with Logistic Decisions: Evidence from an Emerging

      Rahbari, M.; Razavi Hajiagha, S. H.; Amoozad Mahdiraji, H.; Riyahi Dorcheh, F.; Garza-Reyes, Jose Arturo; Kharazmi University, Tehran, Iran; De Montfort University; University of Tehran, Tehran, Iran; University of Derby (Emerald, 2021-05-31)
      This study focuses on a specific method of meat production that involves carcass purchase and meat production by packing facilities with a novel two-stage model that simultaneously considers location-routing and inventory-production operating decisions. The considered problem aims to reduce variable and fixed transportation and production costs, inventory holding cost and the cost of opening cold storage facilities. The proposed model encompasses a two-stage model consisting of a single-echelon and a three-echelon many-to-many network with deterministic demand. The proposed model is a mixed-integer linear programming (MILP) model which was tested with the general algebraic modelling system (GAMS) software for a real-world case study in Iran. A sensitivity analysis was performed to examine the effect of retailers' holding capacity and supply capacity at carcass suppliers. In this research, the number of products transferred at each level, the number of products held, the quantity of red meat produced, the required cold storage facilities and the required vehicles were optimally specified. The outcomes indicated a two percent (2%) decrease in cost per kg of red meat. Eventually, the outcomes of the first and second sensitivity analysis indicated that reduced retailers' holding capacity and supply capacity at carcass suppliers leads to higher total costs. This research proposes a novel multi-period location-inventory-routing problem for the red meat supply chain in an emerging economy with a heterogeneous vehicle fleet and logistics decisions. The proposed model is presented in two stages and four-echelon including carcass suppliers, packing facilities, cold storage facilities and retailers.
    • A novel time, cost, quality and risk tradeoff model with a knowledge-based hesitant fuzzy in-formation: An R&D project application

      Mahdiraji, H.A; Sedigh, M.; Hajiagha, S.H.R.; Garza-Reyes, Jose Arturo; Jafari-Sadeghi, V.; Dana, L.P.; De Montfort University, Leicester; Khatam University, Tehran, Iran; University of Derby; Northumbria University; et al. (Elsevier, 2021-08-01)
      This paper proposes a novel approach for identifying the best implementation situation for each activity in a project by optimizing and balancing time, cost, quality, and risk criteria under uncertain circumstances. A hesitant fuzzy linguistic term sets (HFLTs) approach is proposed to determine the status of project activities in the presence of quality and risk criteria alongside their time and cost. Afterwards, a multi-objective linear programming (MOLP) model is formulated for a time, cost, quality, and risk tradeoff (TCQRT). To validate the model, a research and development project in the food industry was investigated. The results indicate that the project’s time compared to the deterministic approach was reduced by 20%. Completing the R&D project earlier than other competitors bring higher profit than tradeoff expenses, even without considering the quality and risk tradeoff benefits of the proposed approach. Considering uncertainty in risk and quality of activities via HFLTs and also optimizing all four elements of time, cost, quality, and risk simultaneously in a project are the main values of this research. The proposed approach can be employed by managers to adopt and optimize project planning and scheduling while trading off TCQR in uncertain circumstances.
    • Optimisation of a distribution system in the retail industry: An Australian retail industry

      Amjad, M., Daniel, J., Garza-Reyes, J.A.; University of Derby (IEOM Society, 2019-03)
      This paper develops a mathematical model based on inventory routing problem that aims to minimise transportation cost, inventory carrying cost and optimises delivery schedules in a retail Australian industry. A supply chain is considered which comprises of a single distribution centre, having homogenous fleet of vehicles, supplying a single product to multiple retailers having deterministic demand. The mathematical model takes into account varying level of road congestion.
    • Organisational learning and industry 4.0: Findings from a systematic literature review and research agenda

      Belinski, Ricardo; Peixe, Adriana M.M.; Frederico, Guilherme F.; Garza-Reyes, Jose Arturo; Federal University of Paraná, Curitiba, Brazil; University of Derby (Emerald, 2020-07-06)
      Industry 4.0 has been one of the most topic of interest by researches and practitioners in recent years. Then, researches which bring new insights related to the subjects linked to the Industry 4.0 become relevant to support Industry 4.0’s initiatives as well as for the deployment of new research works. Considering “Organisational Learning” as one of the most crucial subjects in this new context, this article aims to identify dimensions present in the literature regarding the relation between Organisational Learning and Industry 4.0 seeking to clarify how learning can be understood into the context of the fourth industrial revolution. In addition, future research directions are presented as well. This study is based on a systematic literature review (SLR) that covers Industry 4.0 and Organisational Learning based on publications made from 2012, when the topic of Industry 4.0 was coined in Germany, using as data basis Web of Science and Google Scholar. Also, Nvivo software was used in order to identify keywords and the respective dimensions and constructs found out on this research. Nine dimensions were identified between Organisational Learning and Industry 4.0. These include Management, Industry 4.0, General Industry, Technology, Sustainability, Application, Interaction between Industry and the Academia, Education and Training, and Competency and Skills. These dimensions may be viewed in three main constructs which are essentially in order to understand and manage Learning in Industry 4.0’s programs. They are: Learning Development, Industry 4.0 Structure and Technology Adoption. Even though there are relatively few publications that have studied the relationship between Organisational Learning and Industry 4.0, this article makes a material contribution to both the theory in relation to Industry 4.0 and the theory of learning - for its unprecedented nature, introducing the dimensions comprising this relation as well as possible future research directions encouraging empirical researches. This article identifies the thematic dimensions relative to Industry 4.0 and Organisational Learning. The understanding of this relation has a relevant contribution to professionals acting in the field of Organisational Learning and Industry 4.0 in the sense of affording an adequate deployment of these elements by organisations. This article is unique for filling a gap in the academic literature in terms of understanding the relation between Organisational Learning and Industry 4.0. The article also provides future research directions on learning within the context of Industry 4.0.
    • Organizational learning paths based upon Industry 4.0 adoption: An empirical study with Brazilian manufacturers

      Tortorella, Jose Arturo G.L., Cawley Vergara, A.M., Garza-Reyes, J.A., Sawhney, R.; University of Derby (Elsevier, 2019-07-03)
      This article aims at examining the mediating role played by Organizational Learning (OL) capabilities at different contextualization levels on the association between Industry 4.0 (I4.0) technologies and operational performance. For that, we gathered information from 135 firms that have initiated their digital transformation towards the fourth industrial revolution era. Data was analyzed by means of multivariate data techniques. Our results show that learning capabilities at an organization level positively mediate the impact of I4.0 for achieving higher operational performance levels. However, OL at a team and individual level may not present a significant effect on such mediation. As I4.0 is claimed to facilitate a faster and more efficient identification and solution of manufacturing problems, our research provides empirical evidence to indicate that companies that systematically foster learning and knowledge sharing at an organization level can obtain greater benefits from I4.0 technologies adoption.
    • A PDCA-based approach to Environmental Value Stream Mapping (E-VSM)

      Garza-Reyes, Jose Arturo; Torres Romero, Joseth; Govindan, Kannan; Cherrafi, Anass; Ramanathan, Usha; University of Derby; University of Warwick; University of Southern Denmark; Cadi Ayyad University; Nottingham Trent University (Elsevier, 2018-02-03)
      Research into the application of Value Stream Mapping (VSM) as a tool to enhance the environmental sustainability performance of operations has been confined to a handful of studies only. Research on this green lean research stream is therefore limited, especially when compared to the vast amount of scholarly research focused on the ‘traditional’ VSM tool. To complement and support the narrow body of knowledge on the application of VSM as tools to improve environmental performance and enhance the effectiveness of its application, this paper proposes an approach, based on the Deming's Plan-Do-Check-Act (PDCA) improvement cycle, to systematically implement and conduct Environmental-VSM (E-VSM) studies. The implementation of the proposed method is reported through an action research-based case study conducted in a helical rolling process of one of the mining consumables business units of an international diversified mining and materials multinational company. The results of the case study indicate that the proposed PDCA-based approach to E-VSM can be an effective alternative to improve the green performance of operations. Besides the proposal of this approach, its testing, and expanding the body of knowledge in the green lean field, the paper also contributes by providing a guiding reference for operations managers who may want to make the operations of their organisations more sustainable and environmentally friendly. Finally, this paper also intends to contribute by inspiring researchers and practitioners to broaden the study of the under-researched field which explores the application of VSM for environmental sustainability enhancement.
    • Performance Efficiency Measurement of Airports: A Comparative Analysis of Airports Authority of India and Public Private Partnership

      Kumar, Anil; Dash, Manoj Kumar; Sahu, Rajendra; University of Derby; BML Munjal University, Gurgaon, India; Indian Institute of Information Technology and Management, Gwalior, India; School of Management, BML Munjal University, Gurgaon, India; Behavioural Economics Experiments and Analytics Laboratory, Indian Institute of Information Technology and Management, Gwalior, India; Indian Institute of Information Technology and Management, Gwalior, India (IGI Global, 2018-04)
      This article describes how to improve the overall efficiency and effectiveness of the aviation sector and also to source extra funding, the Government of India has paved the way for private investors through to a Public Private Partnership (PPP) model since the 1980s. This liberalization step in the Indian aviation market has minimized the institutional barriers which have hindered the freedom and flexibility of air transport operations among private investors. Now, competition within the aviation sector has become fiercer; the Airports Authority of India (AAI) and Public Private Partnership (PPP) in Indian airports are not only providing varied services, but also attracting consumers with new infrastructure and full modern facilities. The importance of this article is because after privatization, no studies have been conducted to examine the efficiency of Indian airports by using Data Envelopment Analysis (DEA). An output-oriented DEA model is employed to determine the efficiency score of airports by taking a sample of 15 airports, including airports run by PPP, for comparison. Output-oriented DEA calculates the efficiency by maximizing the outputs for a given level of inputs. Therefore, this article contributes to the existing literature on Indian airports. Based on available data, three variables - length of runways, terminal size and number of check-in counters, are used as inputs and two variables - passenger movement and aircraft movement, are used as outputs.
    • Performance factors for successful business incubators in Indonesian public universities

      Gozali, Lina; Masrom, Maslin; Zagloel, Teuku Yuri M.; Haron, Habibah N.; Garza-Reyes, Jose Arturo; Tjahjono, Benny; Purna Irawan, Agustinus; Daywin, Frans Jusuf; Syamas, Asril Fitri; Susanto, Sani; et al. (IJTech Universitas Indonesia, 2020-01-29)
      Measuring the performance of business processes is already a main concern for both faculty and enterprise players, since organizations are motivated to reach the productivity stage. Employing a performance achievement framework for the relationship between business incubator success factors will guarantee connection with commercial schemes, which support a high level of performance indicators in successful business incubator models. This research employs a quantitative approach, with the data analyzed using the IBM SPSS version 23 and Smart PLS version 3 statistical software packages. Employing a sample of 95 incubator managers from 19 universities which geographically located in Indonesia, it is shown that the image of business incubator factors has a positive effect on incubator performance. The study investigates the relationship between incubator performance and business incubator success factors in Indonesia. It was found that IT, as part of the business incubators’ facets/abilities, partially supports their performance; that the entry criteria directly support the performance of the incubators; that mentoring networks also support the performance, with good infrastructure systems as a moderating factor; that funding supports the performance of business incubators, also with good infrastructure systems as a moderating factor; and that university regulations and government support and protection enhance the performance of business incubators, with credits and rewards as a moderating factor. In addition, a variety of indicators from the local context affiliate positively to promote a community that highlighted the incubators’ strategies.
    • Performance measurement for supply chains in the Industry 4.0 era: A balanced scorecard approach

      Frederico, G.F.; Garza-Reyes, J.A.; Kumar, A; Kumar, V; University of Paraná, Curitiba, Brazil; University of Derby; University of the West of England (Emerald, 2020-05-06)
      The purpose of this paper is to present a theoretical approach based on the Balanced Scorecard (BSC) with regards to Performance Measurement (PM) in supply chains for the Industry 4.0 era. This paper combines the literature on PM and specifically the BSC related to the dimensions of supply chain in the context of Industry 4.0. Dimensions extracted from the literature based on supply chains within the context of Industry 4.0 showed a strong alignment with the four perspectives of the BSC, which make it suitable to be considered as a Performance Measurement System (PMS) for supply chains in this new context. From theoretical perspective, this study contributes to the limited literature on PM for supply chains in industry 4.0 era. The study proposes a supply chain 4.0 scorecard and strongly support researchers to conduct future empirical researches in order to get a deeper understanding about PM in supply chains in the Industry 4.0 era. As limitations, the theoretical framework proposed needs further empirical research in other to validate it and obtain new insights over the investigation conducted and presented into this paper. Practitioners can use this study as a guide to develop more effective Performance Measurement Systems (PMSs) in their organizations. This research is unique as it addresses a significant knowledge gap related to PM in Supply Chains in the Industry 4.0 era. It brings a significant contribution in terms of understanding how to measure performance in supply chains in this new era.
    • Practical implications and future research agenda of lean manufacturing: a systematic literature review

      Antony, J; Psomas, E; Garza-Reyes, J.A.; Hines, P; Heriot-Watt University, Edinburgh; University of Patras, Greece; University of Derby; Waterford Institute of Technology, Ireland (Taylor & Francis, 2020-06-29)
      Academic literature on Lean Manufacturing (LM) is widely available. However, due to its fragmentation, the contribution of LM from practical and academic perspectives is controversial. This paper establishes the practical implications of LM studies carried out worldwide and identifies novel research streams. A Systematic Literature Review (SLR) of peer-reviewed journal articles was conducted. A total of 401 articles published in 61 journals during 2010-2019 were collected from four major management science publishers. An “affinity diagram” was applied to organize the data into natural and logical themes. Conceptual frameworks concerning LM practical implications and future research agenda were formulated. Meaningful themes of LM practical implications and future research suggestions were revealed and classified into two categories. In category one pertaining to the internal nature of LM, themes related to the pre-implementation, implementation and post-implementation phases of LM were identified. In category two pertaining to the external nature of LM, themes related to the country in which the companies operate, the diverse managerial systems available, and the methodological research approach were identified. The main themes supported in the literature by most references were determined. Finally, respective statements concerning the practical implications of LM and the future research agenda are analytically presented.
    • Predicting changing pattern: building model for consumer decision making in digital market

      Kumar, Anil; Mangla, Sachin Kumar; Luthra, Sunil; Rana, Nripendra P.; Dwivedi, Yogesh K.; BML Munjal University; Graphic Era University, Dehradun, India; State Institute of Engineering and Technology, Nilokheri, India; Swansea University; BML Munjal University, Gurgaon, India; et al. (Emerald Insight, 2018-09-10)
      Purpose Consumers have the multiple options to choose their products and services, which have a significant impact on the pattern of consumer decision making in digital market and further increases the challenges for the service providers to predict their buying pattern. In this sense, the purpose of this paper is to propose a structural hierarchy model for analyzing the changing pattern of consumer decision making in digital market by taking an Indian context. Design/methodology/approach To accomplish the objectives, the research is conducted in two phases. An extensive literature review is performed in the first phase to list the factors related to the changing pattern of consumer decision making in digital market and then fuzzy Delphi method is applied to finalize the factors. In the second phase, fuzzy analytic hierarchy process (AHP) is employed to find the priority weights of finalized factors. The fuzzy set theory allows capturing the vagueness in the data. Findings The findings obtained in this study shows that consumers are much conscious about innovative and trendy products as well as brand and quality; therefore, the service providers must think about these two most important factors so that they can able to retain their consumer in their online portal. Practical implications The analysis shows that “innovative and trendy” is the first priority factor for the consumers followed by “brand and quality” and “fulfilment and time energy.” The proposed model can help the marketers and service providers in predicting customers’ preferences and their changing pattern efficiently under vague surroundings. The outcomes of this research work not only help the service provider to update their products and services according to consumers’ needs but can also help them to increase profit and minimize their risk. Originality/value This work contributes to consumer research literature focusing on problem evaluation in the context of changing pattern of consumer decision making in digital era.
    • Prioritisation of operations improvement projects in the European manufacturing industry.

      Kirkham, Louis; Garza-Reyes, Jose Arturo; Kumar, Vikas; Antony, Ji; Rolls Royce Plc; University of Derby; University of the West of England; Heriot-Watt University (Taylor and Francis, 2014-04-07)
      To improve their competitive ability, organisations are turning towards implementing improvements into their operations and processes. Whilst operations improvement projects are often identified with relative ease, resource constraints limit the ability of organisations to conduct them simultaneously. This paper supports the limited empirical research on prioritisation of improvement initiatives by investigating how European manufacturing organisations conduct this activity. To do this, four hypotheses and two research questions were formulated and tested using a combination of descriptive statistics and two proportion T-tests, while data was collected through a survey questionnaire responded by 203 organisations. The results highlight the importance of objectively prioritising improvement projects and establish that the adoption of this method increases through the implementation of improvement methodologies, especially those that stipulate the use of objective methods towards project prioritisation. In this way, Six Sigma is defined as the most influential improvement methodology for supporting the use of objective prioritisation approaches. The paper also identifies the reasons as to why organisations adopt subjective over objective prioritisation methods, and the most common approaches used by large organisations and small and medium enterprises. This research provides organisations, and their managers, with a better understanding of the different factors that affect this key aspect of operations improvement projects.
    • Proposition of a method for stochastic analysis of value streams

      Luz, G., Tortorella, G.L., Bouzon, M., Garza-Reyes, J.A., Gaiardelli, P.; Universidade Federal de Santa Catarina, Brazil; The University of Melbourne; University of Derby; Università degli Studi di Milano (Taylor & Francis, 2020-10-19)
      This article aims at proposing a method to stochastically analyze values streams taking into consideration the effect of critical uncertainty sources on lead time. The proposed method combines value stream mapping (VSM) and Monte Carlo simulation to identify improvement opportunities. To illustrate this approach, we carried out a case study in the special nutrition value stream of a Brazilian public hospital. Results show that the proposed method allows the identification of improvement opportunities that would not be considered in the classical deterministic VSM approach. Further, the integration of the stochastic analysis enables the determination of a more realistic lead time, which supports a more assertive planning and scheduling of the value stream. The proposed method addresses a fundamental gap in traditional VSM without adding much complexity to the analysis procedure, which is a common practical issue in previous works that integrated other stochastic methods into VSM.
    • Quality assurance for operating room illumination through lean six sigma

      Ozturkoglu, Y; Kazancoglu, Y; Sagnak, M; Garza-Reyes, Jose Arturo; Yasar University, Universite Caddesi, Bornova, Izmir, Turkey; Izmir Kâtip Celebi University, Balatcik Kampusu, Cigli, Izmir, Turkey; University of Derby (International Journal of Mathematical, Engineering and Management Sciences, India, 2021-06)
      Since every mistake made in the healthcare industry can cause permanent harm or even death, some fundamental requirements should be considered when planning and designing operating rooms. Lighting is one of the most important ergonomic factors, especially for operating rooms. This paper investigates the integration of the lean approach and six sigma in measuring the efficiency of LED technology, which can also be regarded as a factor affecting the operating room efficiency. Measurement System Analysis (MSA) and Gage Control methods were applied to determine measurement variability in operating room illumination measurement process. Repeatability and reproducibility (%R&R) was found 12.89%. After calibration, %R&R value was found 8.21%, which implies that calibration helped reduce variability.