Design and Implementation of a Lean Production System for Waste Reduction

Thesis Abstract

The escalating operational costs and environmental concerns encountered by manufacturing firms necessitate the adoption of efficient production methodologies that effectively minimize waste and optimize resource utilization. This study investigates the design and implementation of a lean production system aimed at waste reduction within a medium-sized manufacturing enterprise specializing in electronic component assembly. The primary aim is to develop an integrated lean framework tailored to enhance operational efficiency and environmental sustainability, with specific objectives including the identification of key waste sources, the development of lean tools tailored to the organizational context, and the evaluation of lean system performance post-implementation. Employing a mixed-methods research design, the study integrates qualitative analyses to explore organizational waste practices and quantitative assessments to measure operational improvements. The target population comprises 150 operational staff and management personnel, from which a stratified random sample of 60 respondents was selected to ensure representation across departments. Data collection instruments include structured interviews, observational checklists, and a comprehensive survey questionnaire developed from validated lean theory constructs such as the Toyota Production System (TPS) principles and the Theory of Constraints (TOC). Validity and reliability of the instruments were established through pilot testing, expert validation, and calculation of Cronbach’s alpha coefficients exceeding 0.8, indicating high internal consistency. Data analysis involves thematic analysis for qualitative insights, while quantitative data are analyzed using descriptive statistics, hypothesis testing via t-tests and ANOVA, and regression analysis to examine relationships between lean practices and waste reduction outcomes. Additionally, process mapping techniques such as value stream mapping (VSM) were employed to visualize waste points, and before-and-after comparisons assessed the impact of lean interventions. Expected findings include significant reductions in production cycle times—anticipated to be about 25%—and decreases in material waste volumes by approximately 30%. The implementation of lean tools such as 5S, Kaizen, and Just-In-Time (JIT) is projected to improve process flow, reduce inventory levels, and foster a culture of continuous improvement. The study also anticipates identifying organizational and cultural barriers to lean adoption, providing insights into tailored change management strategies. The research significantly contributes to the existing body of knowledge by offering a context-specific lean framework applicable to small and medium enterprises (SMEs) within the electronics manufacturing sector, demonstrating how theoretical lean principles can be adapted and operationalized to real-world settings. It extends empirical understanding by quantifying waste reduction outcomes attributable to lean implementations and by elucidating the critical success factors influencing sustainability. The principal conclusion advocates that a strategically integrated lean production system, grounded in TPS and TOC theories, can lead to substantial waste reductions and operational efficiencies. It emphasizes the necessity for management commitment, employee engagement, and ongoing training to sustain lean practices. Based on the findings, the study recommends the adoption of continuous improvement programs, investment in lean training for employees, and periodic performance evaluations to ensure enduring waste minimization. It further suggests avenues for future research, including longitudinal studies on lean sustainability and exploration of digital lean tools enabled by Industry 4.0 technologies, to deepen understanding of lean system evolution in dynamic manufacturing environments.