Integrating TQM and Lean Manufacturing for Sustainable Operational Efficiency in Digitalized Manufacturing Industries

Abstract

This study investigates the integration of Total Quality Management (TQM) and Lean Manufacturing (LM) to enhance sustainable operational efficiency in digitalized manufacturing industries. Partial Least Squares Structural Equation Modeling (PLS-SEM) approach was employed to empirically examine the relationship between TQM, LM, digital transformation, operational efficiency, and sustainability performance. Data were collected from 198 managers and supervisors in Indonesian manufacturing firms that have adopted digital technologies. The results reveal that both TQM and LM significantly contribute to operational efficiency, while digital transformation strengthens the synergy between them. Furthermore, operational efficiency positively impacts sustainability performance, demonstrating that efficiency improvements align with sustainability goals. The findings provide theoretical contributions by presenting an integrated framework of TQM Lean Digitalization Sustainability, and practical implications for manufacturing managers seeking to achieve operational excellence in the Industry 4.0 era.