Effectiveness of Single Piece Flow Implementation in Assembly Line Operations

ABSTRACT: This project focuses on the implementation and effectiveness of Single-Piece Flow (SPF) in the A-Line Assembly operations at Roots Industries India Private Limited, a leading manufacturer of automotive horns. The company initially followed a batch production system, which led to operational challenges such as high rejection rates, increased rework, excessive work-in-progress (WIP) inventory, inefficient storage utilization, and long cycle and lead times. These inefficiencies contributed to delays in production, inconsistent daily output, and higher operational costs. To address these issues, the project introduced Single-Piece Flow (SPF) as a lean manufacturing approach aimed at streamlining the assembly process. A quantitative research design was adopted, with pre-implementation data collected over a span of six months, and postimplementation data gathered for 50 days after introducing Single-Piece Flow (SPF). The performance metrics analyzed include daily production output, cycle time (seconds), lead time (minutes), rejection rate (%), rework (%), work-in-progress (WIP) inventory, storage utilization (%), and machine idle time (minutes). Statistical tools such as descriptive statistics, paired sample t-tests, correlation, and regression analysis were used to evaluate improvements across the key parameters. The study’s objectives were to assess enhancements in production performance, quality control, and inventory management efficiency after implementing Single-Piece Flow (SPF). The results indicated a significant improvement in overall efficiency, with reductions in lead time, cycle time, rejection and rework rates, and better inventory and space utilization. The study concludes that Single-Piece Flow (SPF) positively impacts production operations, making it a highly effective lean strategy for Roots Industries India Private Limited to achieve consistent quality, timely output, and reduced waste in horn manufacturing. KEYWORDS: Single-Piece Flow, Lean Manufacturing, Production Efficiency, Inventory Management, Quality Improvement