Browsing by Author "Jayamaha, Nihal"

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A supplier development framework for agri-food value chains in developing countries : a test on a dairy value chain in Sri Lanka : a thesis with publication presented in partial fulfilment of the requirement for the degree of Doctor of Philosophy in Logistics and Supply Chain Management, School of Food Technology and Natural Sciences, Massey University, Manawatū, New Zealand
(Massey University, 2025) DeSilva, Leeza
Agri-food value chains (AVC) in developing countries, including dairy value chains (VC), face significant challenges. A key issue is farmers' limited capacity to improve their operational performance (e.g., product quality, delivery, and production efficiency) despite the support they may typically receive, which hinders the achievement of their triple-bottom-line (TBL) outcomes. In an AVC, farmers supply commodities that buyers (e.g., processors) purchase to add value. The concept of supplier development (SD) refers to a buyer taking an effort—strong or weak—to improve the capability and/or performance of their supplier. This makes SD (as understood in operations and supply chain management), an attractive proposition for predicting and explaining how farmer development initiatives by buyers can improve farmers' operational performance and their TBL outcomes. The objectives of the study were to: (i) study the dairy VC of Sri Lanka to understand how farmer development takes place through a milk processor; (ii) develop and test a theoretical model that predicts and explains the relationship between processor-led farmer development initiatives, farmer capability, processor-farmer relationship, and a farmer’s sustainable performance; (iii) analyze farmer heterogeneity to enable milk processors and other interested parties to better focus on farmer development initiatives; (iv) develop an index to measure the overall sustainable performance of dairy farmers and facilitate efficient, sustainability-focused development. The model developed through the literature posited that farmer development—farmer training (FT), financial support (FS), evaluation and feedback on farmer quality performance (EFFQP)—results in farmer TBL performance, through the mediation effects of farmer capability (FC) and processor-farmer relationship (PFR). Data collected from 324 Sri Lankan dairy farmers were analyzed using partial least squares structural equation modeling (PLS-SEM). The heterogeneity analysis was conducted using cluster analysis, while the parameters of the sustainability index were estimated by fitting an index-creating model to the data. The findings supported the overarching hypothesis. FS as well as EFFQP were found to be having a more substantial positive impact on sustainable farmer performance than FT. Cluster analysis identified three distinct clusters—labeled as laggers, accelerators, and leaders—based on the cluster variables used. Laggers were found to be significantly underachieving in economic outcomes and FC, compared to accelerators. Notable differences in farmer and farm characteristics were identified across these clusters, and cluster-specific suggestions were provided to milk processors and policymakers to improve the FC and TBL outcomes of the farmers. The overall sustainability index, which considered farmer TBL outcomes and their enablers, suggested that all components and sub-components of the index are important (weight-wise) but farmer capability as a category commanded the highest weight (0.236) and farmer’s economic outcomes as a category commanded the lowest weights (0.170). The implications of these empirically generated weights were discussed and how the study contributes to new knowledge was argued.
The key factors driving successful improvement in primary care : a mixed methods investigation of the determinants of quality improvement success in Aotearoa New Zealand : a thesis with publication presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy, Massey University, Palmerston North, Aotearoa New Zealand
(Massey University, 2023-11-30) Cullen, Jane
Primary care is where the population receives most of their health care and where successful quality improvement (QI) can have the biggest impact on health, wellbeing, equity, and health system performance. A better understanding of the factors that influence QI in primary care is urgently needed to support a high-performing primary healthcare system. Most prior studies into the determinants of effective QI have focused on secondary care organisations and large-scale collaborative efforts. Primary care services such as general practice present a different set of challenges. Various key contextual factors have been identified in the literature, but few studies explain how they relate to each other and QI success. This study sought to answer the following questions: 1. What are the contextual factors influencing primary care improvement interventions? 2. How do the contextual factors, improvement content (topic and planned changes) and the implementation process influence each other and the improvement outcomes in primary care? 3. How applicable for primary care assessment is the Model for Understanding Success in Quality (MUSIQ), a tool for assessing modifiable contextual factors developed in secondary care? This research was an explanatory sequential mixed methods study based in the Aotearoa, New Zealand (NZ) primary care setting of general practice and Primary Health Organisations (PHOs). Amulti-case mixed methods approach was followed in the first stage. Mainly qualitative data were collected from primary care interviews guided by the Consolidated Framework for Implementation Research (CFIR). This was compared with quantitative data from the MUSIQ survey. The second stage consisted of a national survey where emerging theory was tested by partial least squares structural equation modelling (PLS-SEM). The findings revealed that most teams did not use formal QI methods, instead relying on their people-centred relationship skills and networks to drive QI via distributed leadership. Teams were intrinsically motivated by community and patient need and drew on strengths developed within the complexity and uncertainty of the primary care settings to drive QI. The collaborative skills which are increasingly required in the modern primary care setting support the shared social processes of sensemaking for enacting change. The key success factors driving QI in primary care are identified and how they relate to each other explained. A primary care adaptation of MUSIQ has been proposed that may aid improvement practitioners and researchers to assess primary care contexts. The key strengths should be developed and supported across primary care services and capability, capacity and resources supported centrally to increase the ability of primary care to improve services more easily and effectively.
The mediating role of organisational culture in the relationship between region-based firm ownership type (RBFOT) and manufacturing performance : a test on the apparel industry in Sri Lanka : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Massey University, New Zealand
(Massey University, 2022) Gunasekera, Marlon
In today’s globalised context, manufacturing firms belonging to various regions of the world expand their businesses beyond borders and gradually become international, multinational, and global companies investing in various countries and regions of the world. Most of these firms establish foreign affiliates and compete with the local (domestic) firms in host countries. In this context, international and cross-cultural operations management studies have high theoretical and practical value in understanding how management practices, systems, techniques, and norms account for the manufacturing performance differences between foreign and local firms. Understanding and explaining the reasons for differences in the manufacturing performance of local and foreign-owned firms is an underexplored research area, especially in the developing regions of the world. This study adopts a cross-cultural operations management perspective and hypothesises that differences in organisational culture traits (related management practice orientations) of firms belonging to different regions of the world account for manufacturing performance differences. The study examines the relationship between Region-Based Firm Ownership Type (RBFOT) and manufacturing performance, and the mediating role of the organisational culture (an important influence on manufacturing practices) in this relationship. The study was based in Sri Lanka (South Asia) with the apparel industry as the context, and local firms are compared with foreign firms from two other regions: Western and East Asian. Semi-structured interviews were used to clarify the research context and to understand how foreign-owned firms set up, operate and establish organisational cultures in Sri Lanka. The subsequent quantitative study covered 93 firms with data aggregated to the firm level to test the mediation model. To test the model, ANOVA and parallel multiple mediation analysis using regression-based SPSS PROCESS macro were adopted. The findings revealed that organisational culture (measured using Denison’s culture traits and related management practice orientations) is a significant mediator in explaining the difference in the manufacturing performance of RBFOTs. Moreover, significant differences in culture traits and related management practice orientations were evident between Western, East Asian, and South Asian firms generating different levels of manufacturing performance. Other contributions include developing a new scale to measure the manufacturing performance of apparel firms and validating Denison’s Organisational Culture Survey (DOCS) in Sri Lanka. Overall, the study contributes to the theory and practice of international and cross-cultural operations management in general and apparel industrial management in particular.
Theorising and testing the underpinnings of Lean Six Sigma : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Engineering, School of Food and Advanced Technology, Massey University, Manawatū, New Zealand
(Massey University, 2023-12-07) Halnetti Perera, Achinthya Perera
Lean Six Sigma (LSS) is a widely used business process improvement method that combines Lean and Six Sigma. Despite its popularity and large volumes of research, the theoretical underpinnings of LSS remain underdeveloped. This thesis explores the theoretical foundations and practical implications of LSS, using an LSS project as the unit of analysis. Research objectives include: (i) identifying and operationalising the determinants of LSS, (ii) hypothesising the relationships between the determinants of LSS in predicting and explaining LSS project performance and testing the hypothesis empirically, (iii) assessing the impact of residual risks on LSS project performance, (iv) interpreting theoretical relationships from a practical perspective, and (v) testing whether LSS fits to nonmanufacturing as well as it would to manufacturing at a theoretical level. To achieve the objectives, a conceptual model was first framed by conducting a comprehensive literature review on available theories of SS/LSS and a novel approach (machine learning) to extract essential elements from the literature on critical success factors (CSFs). The conceptual model was then developed into a testable theoretical model through case research, which facilitated the operationalisation of the theoretical constructs. The overall hypothesis underpinning the theoretical model states, “Leadership engagement drives LSS Project Initiation and the Continuous Improvement Culture to execute an LSS project to yield the desired outcomes, but the Project Execution → Project Performance causal link would be moderated by the project residual risk”. Finally, the theory was empirically tested using partial least squares structural equation modelling based on data from 296 organisations worldwide. Although the data supported the overall hypothesis, some individual paths failed to support the model (p > 0.05). For example, project residual risk did not moderate the impact as anticipated, indicating that risk assessment is given significant attention during LSS project initiation. The total effect of Leadership Engagement on LSS Project Outcomes was 0.216 (p < 0.001), implying its practical importance (medium effect). The model fitted to nonmanufacturing equally well as manufacturing, supporting the hypothesis. Although case studies suggested that LSS projects are defined differently in manufacturing and nonmanufacturing and LSS structure differs from context to context, the model is robust enough to provide a solid theoretical foundation for LSS. The study adds to the current body of knowledge as a theory extension to the field of quality and operations management.
Validating the theoretical underpinnings of the ISO 9001:2015 quality management system standard : a multi-country study : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Engineering at Massey University, Manawatu, New Zealand
(Massey University, 2020) Pallawala, Nisansala
ISO 9000 family of quality management system (QMS) standards — particularly ISO 9001, which stipulates QMS requirements for compliance — have received a great deal of attention by academia and practitioners. Every year, thousands of organisations obtain ISO 9001 certification worldwide, and a plethora of studies have examined the effectiveness of ISO 9001 implementation, empirically or otherwise. One existing knowledge gap is the absence of a comprehensive study that examines the theoretical validity of ISO 9001. Another is ascertaining how ISO 9001 compliance requirements are accepted across countries and regions, given that ISO 9001 is meant for sociotechnical systems. Using responses received from 240 ISO 9001 certified manufacturing companies in five countries, this study empirically examined the theoretical validity of ISO 9001:2015, which is claimed to underpin Plan-Do-Check-Act (PDCA) at the overall QMS level. The theoretical model of the study which posited that “Leadership Driven QMS Planning (LDQMSP) (reflected via clauses 04 through to 07 of the standard) leads to implementing the planned processes (reflected via clause 08), and checking the effectiveness of these processes (reflected via clause 09) and taking appropriate action (reflected via clause 10) leads to QMS Results” was found to be a good fit to data, based on goodness of fit criteria used in partial least squares structural equation modelling. As regards national culture effects and regional effects (Australasia, South Asia, and Greece), the empirical test results found that national culture (or region) plays only a very minor role in making ISO 9001 based continual improvement (PDCA) of the QMS being more acceptable to certain cultures than to others; power distance (PDI) and individualism (IDV) showed positive and negative effects (but small) respectively on Plan (LDQMSP), Do, Check, Act, and QMS Results as hypothesised. However, uncertainty avoidance (UAI) failed to show a significant effect (α = 0.05). Similarly, the mean scores of Plan (LDQMSP), Do, Check, Act, and QMS Results of South Asia were found to be higher than those of Australasia, although these effects were small. Thus, the findings support the universal relevance and acceptance of the standard, although the study was limited to ISO 9001 certified manufacturing firms of five selected countries. Contributions of the findings were highlighted, and further research directions were suggested.