Engineering and Technology
| Open Access |
DOI: Kanban-Based Three-Bin Replenishment System to Reduce Line Downtime and Material Shortages: A Case Study in a Leaf Vacuum and Generator Manufacturing Plant
Sai Prasad Ravulapally , Independent Researcher, Shakopee, Minnesota, USAAbstract
To maintain continuous production in high-volume manufacturing settings, the implementation of efficient internal logistics and material replenishment systems is essential. This study offers a case analysis of the design and implementation of a Kanban-based three-bin replenishment system within a manufacturing facility that produces leaf vacuum equipment and portable generators. The plant's previous operational framework, characterized by a push-based material delivery system, was plagued by considerable operational shortcomings. These deficiencies manifested as frequent material shortages, excessive inventory accumulation on the production line, and insufficient visibility into material status. Examination of ERP data indicated that material shortages were responsible for roughly 56 hours of monthly production downtime. Moreover, the existence of obsolete or compromised inventory contributed to annual scrap costs nearing $240,000.
To address these challenges, a three-bin Kanban pull system was implemented. This system included standardized containers, separate storage areas for warehousing and production, visual labeling, and a pre-defined tugger delivery route linking a central warehouse with ten production lines. An evaluation was conducted, utilizing six months of baseline operational data and a two-month pilot implementation across four assembly lines.
The numbers indicate significant operational gains. The average monthly downtime attributed to materials saw a dramatic reduction, plummeting from 56 hours to 4 hours.
In the worst cases, it took operators more than two hours to find parts. Now it only takes about two minutes. Inventory waste plummeted by nearly 80%, slashing yearly scrap expenses from roughly $240,000 to around $48,000. These outcomes clearly demonstrate that reworking internal logistics using Kanban-inspired container systems can significantly boost material availability, production dependability, and operational efficiency within high-volume assembly environments.
Keywords
Kanban, Lean manufacturing, Pull systems, Inventory management, Internal logistics, Production downtime, Three-bin replenishment, Push systems
References
Black, J. T. (2007). Design rules for implementing the Toyota production system. Industrial Press, Design rules for implementing the Toyota Production System.
Christopher, M. (2016). Logistics and supply chain management (5th ed.). Pearson, LSCH_A01.QXD.
Hopp, W. J., & Spearman, M. L. (2011). Factory physics (3rd ed.). Waveland Press, (7) Of Physics and Factory Physics.
Liker, J. K. (2004). The Toyota way: 14 management principles from the world's greatest manufacturer. McGraw-Hill, (PDF) The 14 principles of the Toyota way: An executive summary of the culture behind TPS.
Liker, J. K., & Meier, D. (2006). The Toyota way fieldbook. McGraw-Hill, (PDF) The Toyota Way Fieldbook.
Ohno, T. (1988). Toyota production system: Beyond large-scale production. Productivity Press, (PDF) The Toyota Production System and art: Making highly customized and creative products the Toyota way.
Rother, M., & Shook, J. (2003). Learning to see: Value stream mapping. Lean Enterprise Institute, (PDF) Learning to See: Value Stream Mapping to Create Value and Eliminate Muda.
Schonberger, R. (1982). Japanese manufacturing techniques. Free Press, Japanese-Manufacturing-Techniques-Nine-Hidden-Lessons-in-Simplicity.pdf.
Slack, N., Brandon-Jones, A., & Johnston, R. (2016). Operations management (8th ed.). Pearson.
Spearman, M. L., Woodruff, D. L., & Hopp, W. J. (1990). CONWIP: A pull alternative to Kanban. International Journal of Production Research, (PDF) Conwip: A Pull Alternative to Kanban.
Sugimori, Y., Kusunoki, K., Cho, F., & Uchikawa, S. (1977). Toyota production system and Kanban system. International Journal of Production Research, Toyota production system and Kanban system Materialization of just-in-time and respect-for-human system: International Journal of Production Research: Vol 15, No 6.
Womack, J. P., & Jones, D. T. (2003). Lean thinking. Free Press, (PDF) Lean Thinking : Banish Waste and Create Wealth in Your Corporation.
Hall, R. (1987). Zero inventories. Dow Jones-Irwin.
Monden, Y. (2012). Toyota production system: An integrated approach to just-in-time (4th ed.). CRC Press, Toyota Production System | An Integrated Approach to Just-In-Time, 4th.
Download and View Statistics
Copyright License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors retain the copyright of their manuscripts, and all Open Access articles are disseminated under the terms of the Creative Commons Attribution License 4.0 (CC-BY), which licenses unrestricted use, distribution, and reproduction in any medium, provided that the original work is appropriately cited. The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.