The Impact of Supplier Relationship Management on Procurement Efficiency in Manufacturing Firms

Thesis Abstract

In the context of increasingly competitive manufacturing sectors, effective supplier relationship management (SRM) has emerged as a critical determinant of procurement efficiency, yet limited empirical evidence exists regarding the specific mechanisms through which SRM influences procurement outcomes in manufacturing firms. This study aims to evaluate the impact of SRM practices on procurement efficiency within manufacturing organizations, with particular focus on how supplier collaboration, communication, and trust contribute to cost reduction, lead-time improvement, and quality enhancement. The specific objectives are to examine the extent to which different dimensions of SRM influence procurement efficiency, identify the key SRM practices adopted by manufacturing firms, and assess the mediating role of supplier performance in this relationship. The research adopts a quantitative, cross-sectional survey design rooted in the relational exchange theory and resource-based view as the theoretical frameworks, which posit that strategic supplier relationships foster resource sharing and mutual benefits, thereby enhancing procurement outcomes. The target population comprises procurement managers and supply chain professionals working in manufacturing firms across the automotive and electronics sectors in the country, totaling approximately 450 firms. Using stratified random sampling, a sample of 220 firms will be selected to ensure representation across industry sub-sectors and firm sizes. Data collection will be conducted through structured questionnaires, developed based on validated scales from existing literature, with reliability confirmed through Cronbach's alpha coefficients exceeding 0.80. The questionnaires will measure SRM practices, procurement efficiency indicators (cost savings, lead time reduction, quality improvements), and supplier performance metrics. Data analysis will employ descriptive statistics to portray respondent profiles and key variables, while inferential analysis will be conducted using multiple regression analysis to determine the influence of SRM practices on procurement efficiency. Structural equation modeling (SEM) will be applied to examine the potential mediating effect of supplier performance, with model fit assessed using indices such as CFI, TLI, and RMSEA. Additionally, factor analysis will validate the construct validity of the measurement scales. Ethical considerations, including confidentiality and voluntary participation, will be strictly observed throughout the research process. Key expected findings include a significant positive relationship between collaborative SRM practices—including joint problem-solving and information sharing—and procurement efficiency metrics. Trust and communication are anticipated to serve as crucial mediators that strengthen this relationship by fostering supplier performance improvements. The study is expected to reveal that comprehensive SRM frameworks that integrate strategic partnership dimensions substantially enhance procurement outcomes, particularly in terms of cost reductions and process optimizations. This research contributes to the existing body of knowledge by empirically substantiating the critical linkages between SRM practices and procurement efficiency, specifically within manufacturing settings, thus extending theoretical understanding grounded in relational and resource theories. The findings provide managerial insights into how manufacturing firms can design and implement more effective SRM strategies to realize procurement efficiencies, particularly emphasizing the importance of trust, communication, and supplier collaboration. The main conclusion underscores that robust SRM practices have a measurable, positive impact on procurement efficiency in manufacturing firms, mediated significantly by supplier performance enhancements. Based on these findings, it is recommended that manufacturing firms invest in strategic relationship-building activities, including trust development and joint innovation initiatives, to optimize procurement processes. Future research could explore longitudinal effects of SRM practices and investigate industry-specific factors influencing the relationship, thereby enriching the understanding of how SRM dynamically evolves to sustain competitive advantage over time.