Implementing lean manufacturing practices is crucial for improving operational efficiencies in diverse industries. The primary objective is to comprehensively analyze the implementation of lean principles within these manufacturing facilities. This study employs the Rapid Plant Assessment (RPA) method to evaluate the strengths and weaknesses of operational processes. Conducting extensive visits to various KSA factories, this research assesses key aspects including customer satisfaction, safety standards, visual management, teamwork, equipment maintenance, supply chain integration, and commitment to quality. The findings reveal consistent above-average customer satisfaction and commendable safety standards across all factories. However, notable variations exist in teamwork and equipment maintenance practices among these facilities. The study highlights the necessity for targeted improvements in visual management, supply chain integration, and standardized practices to bolster operational efficiencies and uphold quality standards within Saudi Arabia's manufacturing sector.