Lean and green – a systematic review of the state of the art literature

The move towards greener operations and products has forced companies to seek alternatives to balance efficiency gains and environmental friendliness in their operations and products. The exploration of the sequential or simultaneous deployment of lean and green initiatives is the results of this balancing action. However, the lean-green topic is relatively new, and it lacks of a clear and structured research definition. Thus, this paper’s main contribution is the offering of a systematic review of the existing literature on lean and green, aimed at providing guidance on the topic, uncovering gaps and inconsistencies in the literature, and finding new paths for research. The paper identifies and structures, through a concept map, six main research streams that comprise both conceptual and empirical research conducted within the context of various organisational functions and industrial sectors. Important issues for future research are then suggested in the form of research questions. The paper’s aim is to also contribute by stimulating scholars to further study this area in depth, which will lead to a better understanding of the compatibility and impact on organisational performance of lean and green initiatives. It also holds important implications for industrialists, who can develop a deeper and richer knowledge on lean and green to help them formulate more effective strategies for their deployment

A realist evaluation of the contribution of Lean Six Sigma to person-centred cultures in a university hospital

Background: Lean Six Sigma, a quality improvement methodology, has been used in healthcare since 2001. Person-centred approaches to healthcare improvement are now widely advocated in political, policy and practice discourse. Literature shows quality improvement practitioners are often unaware of or pay little attention to Lean Six Sigma’s philosophical roots, seeing it less as an organisational philosophy but more as a quality improvement tool for continuous improvement. A lack of fidelity to Lean Six Sigma’s philosophical roots can create a division between person-centred approaches to transforming care experiences and services, and quality improvement methods focusing solely on efficiency and clinical outcomes. There is little research into, and a poor understanding of, the mechanisms and processes through which Lean Six Sigma education influences healthcare staff’s person-centred practice. Aim: To address the question: whether, to what extent and in what ways, Lean and Six Sigma in healthcare contribute to person-centred care and cultures. Design and methods: Realist review identified three potential Context, Mechanism, Outcome configurations (CMOcs) that explained how Lean Six Sigma influenced practice, relating to staff, patients and organisational influences. A realist evaluation explored how staff interacted with a Lean Six Sigma education programme (the intervention). Specifically, the CMOc relating to staff was adjudicated by study participants to determine whether, to what extent and in what ways it influenced person-centred care and cultures. Data collection was informed by person-centred principles and took place through a series of workshops and semi-structured interviews, followed by a review of research participants’ improvement projects outcomes. Findings: Three focused CMOcs, Aspects of Organisational Culture, the Organisation’s Receptivity and Participants’ Self-perception, emerged from the adjudication of the CMOc relating to staff, illuminating the contextual factors (C) that facilitated the outcomes (O) that arose from the underlying mechanisms (M) that were active when the contextual factors (C) were present. Synergies (respect for persons, voice of the customer, staff empowerment and observational studies), an influencer (quality) and divergences (core values, standardisation and first principles) between participants’ Lean Six Sigma practice and person-centred care and cultures were also revealed. Discussion: A return to Lean Six Sigma’s philosophical roots facilitates coherence in the philosophy, intention, methods and outcomes between Lean Six Sigma and person-centred approaches. Their combined use is not only possible but may also be desirable, enabling Lean Six Sigma practitioners to work in ways that support the development of quality, person-centred care that takes account of the outcomes for, and experiences of, patients, their families and staff. Incorporating person-centred principles into the research design, whilst adhering to the principles and rigour of realist evaluation, resulted in a new way of adjudicating CMOcs and novel methods of working with research participants. This study contributes to the evidence base on the study of quality improvement beyond the effectiveness of interventions alone. The findings will be of interest to researchers, policymakers and practitioners globally. Keywords: Lean, Six Sigma, Lean Six Sigma, Process improvement, Person-centredness, Person-centred care, Person-centred cultures, Kaizen

Investigating the green impact of Lean, Six Sigma and Lean Six Sigma: A systematic literature review

© 2017, © Emerald Publishing Limited. Purpose: The academic literature and research lines exploring the effect of quality improvement methods on environmental performance still remain in early stages. The purpose of this paper is therefore to investigate, through a systematic review of the existing academic literature, the environmental (green) impact of using quality and operations improvement methods such as Lean, Six Sigma and Lean Six Sigma. This includes the impact on energy saving and the usage of natural resources. Design/methodology/approach: This study follows a systematic literature review approach through which it analyses research papers published in top 16 operations and quality management journals. No specific time frame was established, but a set of keywords were used to short-list the articles. A sample of 70 articles was finally short-listed and analysed to provide a discussion on environmental concerns related to Lean, Six Sigma and Lean Six Sigma. Findings: The comprehensive review of short-listed articles indicates that both Lean and Six Sigma can be considered effective methods to support the conservation of resources, combat global warming and saving energy. Various scholars provide evidence of this, and as such, organisations should not only consider these methods to manage quality and improve operational performance but also meet environmental regulations. A set of research questions that demands further investigation has also been proposed based on the findings of this research. Research limitations/implications: This study is limited to a sample of 70 articles collected from top 16 operations and quality management journals. The search of journals is also limited to a set of key words (“Lean”, “Green”, “Six Sigma”, “environment”, “sustainable” and “sustainability”) used to short-list the sample size. Practical implications: The study shows that organisations can consider the adoption of Lean, Six Sigma and Lean Six Sigma to meet environmental regulations, save costs and also meet quality management standards. This will contribute in helping organisations to formulate more effective and inclusive strategies which do not only consider the quality and operational dimensions but also the environmental dimension. Originality/value: Literature exploring the environmental/green impact of quality management methods commonly used in industry is limited. There is also a lack of studies aiming to investigate the green impact of Lean and Six Sigma in top operations and quality management journals. The study focusing on investigating the green impact of Lean, Six Sigma and Lean Six Sigma methods altogether is also a research first of its kind

Green-Lean Synergy - Root-Cause Analysis in Food Waste Prevention

Purpose_The goal of this paper is to explore the possible synergetic effects between lean philosophy and green endeavors in improving resource efficiency in the food sector. To that end, it is investigated how a proper and tailor-made adaptation of the lean six sigma root cause analysis method could help in overcoming the complexities of increased resource efficiency in food production.Design/methodology/approach_The case study concerned reduction of waste at an industrial production line of a dough-based product, through the implementation of the lean six sigma tool.Findings_An achievement of a 50% reduction of waste on the studied process line was reached, thus exceeding the initial improvement goal.Research limitations/implications (if applicable)_While the explicit findings on the specific root causes of waste on this actual production line are not immediately transferrable to other cases, they show that applying this method to identifying and eliminating root causes of waste for other products and processes in the food sector could not only reduce costs but also contribute to more resource-efficient and sustainable industrial food production.Practical implications (if applicable)_ Political and public high interest in environmental and social sustainability associated with food waste render this an important development.Originality/value_ While the potential of linking green and lean efforts has been acknowledged, the application of the lean six sigma methodology for more sustainable food production has not yet been explored. This paper contributes to this researc

A lean six sigma framework for continuous and incremental improvement in the oil and gas sector

This article aims to explore synergies between Lean Production (LP) and Six Sigma principles in order to propose a Lean Six Sigma (LSS) framework for continuous and incremental improvement in the oil and gas sector. The Three-Dimensional LSS Framework seeks to provide various combinations about the integration between LP principles, DMAIC cycle and PDCA cycle to support operations management needs. Design/methodology/approach - The research method is composed of two main steps: (i) diagnostic of current problems and proposition of a conceptual framework that qualitatively integrates synergistic aspects of LP and Six Sigma; and (ii) analysis of the application of the construct through semi-structured interviews with leaders from oil and gas companies to assess and validate the proposed framework. Findings - As a result, a conceptual framework of LSS is developed contemplating the integration of LP and Six Sigma and providing a systemic and holistic approach to problemsolving through continuous and incremental improvement in the oil and gas sector. Originality/value - This research is different from previous studies because it integrates LP principles, DMAIC and PDCA cycles into a unique framework that fulfils a specific need of oil and gas sector. It presents a customized LSS framework that guides wastes and costs reduction, while enhances quality and reduces process variability to elevate efficiency in operations management of this sector. The paper type is an original research that present new and original scientific findings.N/

Green and lean sustainable development path in China: Guanxi, practices and performance

Globalisation has created both drivers and pressure for Chinese organisations to enhance their business performance as well as environmental performance. Green and lean practice is emerging as a critical approach for Chinese organisations to achieve sustainable development and improve organisational performance. By conducting empirical studies from 172 respondents on green and lean practice in different Chinese organisations, this research shows how green and lean practice affects organisational performance and how this association is affected by guanxi. The findings explain that guanxi between organisational partners improves the positive effect of green and lean practice on organisational performance. The results of this paper offer helpful insights into how managers should enhance their guanxi initiatives, in order to improve environmental and business performance over their supply chains. The paper also suggests the limitations of this research, as well as directions for future research

Lean manufacturing and environmental performance – exploring the impact and relationship

The relationship between Lean Manufacturing and Environmental Performance has attracted much debate but at the same time lack of empirical evidence leaves haphazard opinions on this matter. The objective of this paper is therefore to pro-vide some insight into the impact of Lean Manufacturing on Environmental Per-formance and the existing relationship of these two concepts. Four semi-structured interviews with industrial and academic experts provided a solid ground to suggest that the relationship does exist, despite the fact that these two concepts were developed independently from each other. Being the exploratory nature of this study and its purpose to ignite further research, it does not employ a quantitative approach. The results of this study can help managers to better un-derstand and concurrently tackle both the economic and environmental challenges faced by their organizations.N/

Lean-green manufacturing practices and their link with sustainability: a critical review

The current rapidly changing and highly competitive market has put companies under a great pressure towards adopting sustainable practices, in terms of keeping a healthy balance among economic, environmental and social performances. In this context, the lean-green manufacturing approach, which combines lean practices focused on customers’ demand, and green practices focused on reducing the business’ environmental impact, has gained popularity. Nevertheless, the lean-green manufacturing is still a relatively new practice, lacking a clear and structured research definition, and of significant evidence of successful cases in the practice. In this paper, a literature review is conducted to identify the actual possibility of combining lean and green practices, the current trends for implementing such combination and the potential sustainability improvements such implementation can lead. It is the authors’ intention that the findings analysed in this paper can contribute to the state-of-the-art of lean-green manufacturing and provide practitioners with a useful tool towards developing effective strategies for its deployment

A systematic literature review of hybrid approaches of lean, agile and six sigma philosophies in supply chain management

The purpose of this study is to critically review the current literature on hybrid approaches of lean, agile and six sigma applications in supply chain management. Lean, agile and six sigma are improvement philosophies; these are developed in the manufacturing industry. In the last two decades, the applications of these philosophies have received considerable attention in both the manufacturing and the service industries. This attention is evident in many published studies in different journals, showing challenges and limitations for adopting these philosophies, including the integrated lean six sigma (LSS) and lean-agile (legality or leagile) in the supply chain practices. However, studies on hybrid approaches of lean, agile and six sigma philosophies in the supply chain management using a systematic literature review are relatively lacking. With this motivation, this study aims to address such gaps in the supply chain management literature. More specifically, it focuses on exploring the challenges and limitations to identify the benefits of hybrid approaches in border supply chain management. In particular, to identify how those challenges and limitations impact on overall supply chain practices and performance. To this end, the final sample of 118 peer-reviewed articles was reviewed to constitute the knowledge base of the study. Therefore, this study critically reviewed and analysed previous theoretical and evidence-based literature on the key themes associated with the topic by using a systematic literature review. This study adopted a systematic literature review research methodology involving a three-stage review method. The three stages were (1) planning the review; (2) conducting the review; and (3) reporting and dissemination. This study presents the details of the literature search, outcomes of the search, subsequent analysis of 118 articles from 40 different journals, and contributions to knowledge, key findings and recommendations. This study is one of the first systematic literature reviews on hybrid approaches of lean, agile and six sigma philosophies, in particular reviewing the literature to explore to what extent hybrid approaches of these philosophies influence supply chain practices and performance in the context of various industries. None of the previous literature has critically reviewed the hybrid approach of lean, agile and six sigma philosophies in terms of challenges and limitations in the context of supply chain practices. This study adds to the existing literature by critically reviewing the literature on hybrid approaches of lean, agile, and six sigma philosophies, emphasizing challenges, limitations, and benefits of integrated approaches in the context of supply chain management for various industries. Based on a critical literature review, a conceptual framework is developed as the basis of integrated LASS philosophy for supply chain management

An integrated lean and ISO 14001 framework for environmental performance: an assessment of New Zealand meat industry

The aim of this paper is to explore the implementation of an integrated lean and ISO 14001 approach in meat industry for environmental performance and examine a proposed conceptual framework by capturing insights from lean and ISO 14001 experts in New Zealand (NZ). Semi-structured interviews have been conducted with a group of consultants (lean and ISO 14001) to evaluate the suitability of an integrated lean and ISO 14001 approach in the meat industry for environmental performance. A conceptual framework from literature has guided this study leading to its further development based on the empirical evidence collected. Findings have illustrated a synergistic positive impact of lean and ISO 14001 implementation as an integrated approach for sustaining environmental performance in the meat industry. A joint implementation programme provides more clarity in aligning ISO 14001 operational procedures with lean tools and techniques for an enhanced environmental performance outcome. The application of an integrated lean and ISO 14001 framework is proposed in this paper, which can help industry practitioners and academia in developing a joint implementation strategy and conducting future research. To the best of author’s knowledge, this study is the first to assess the effective implementation of lean and ISO 14001 as an integrated approach in the New Zealand meat industry.Publishe