Reduction of Process Lead Time Using Lean Tool - Value Stream Mapping (VSM)

Abstract:

The research is designed to reduce production lead time using Value Stream Mapping (VSM). The purpose of this lean tool is to uncover the wastes in supply and production process by separating value-adding and non-value-adding steps first and then reduce non-value added steps. A map shows the current state of the operation is drawn first using the time and flow data. By this non-value added actions are recognized and the waste of time and resources between the steps are also identified. To reduce lead time and streamline the process the map is analyzed. The lead time can be reduced by taking some actions or applying some lean tools. Value adding time in the whole process increases and the process production lead time decreases after reducing the wastes. A future state map is made with new and improved processes. Future state map makes the reformed process more effective and more efficient. It comprises the developments through some value stream symbols used only for this mapping. Bata, a leading shoe company was selected for this research work. To draw the current state map, data was collected from the floor. The wastes identified then which were waiting, motion, inventory & transport. The lean tools that were suggested to apply for reducing these wastes were Kanban, Kaizen, Safety Stock and some manpower adjustment. Kanban is a method to achieve JIT, a system to control the logistical chain from a production point of view and also an inventory control system. Safety stock represents an inventory hedge against problems such as downtime, to protect the system against sudden fluctuations in customer orders or system failures. And Kaizen is the small and continuous improvement methods. The result of the research was quite remarkable as this decreases the lead time by around 8% and increases the capacity by 8.8%. It is feasible to use value stream map in the current situation.

• Periodical: Applied Mechanics and Materials (Volume 860)
• Pages: 74-80
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.860.74
• Online since: December 2016
• Authors: Antor Habib Chowdhury*, Sakib Shahriar, Tanvir Hossen, Pallab Mahmud
• Keywords: Lead Time Reducing, Lean Manufacturing, Lean Tool, Value Stream Mapping, VSM

References

[1] THE MACHINE THAT CHANGED THE WORLD, by JAMES P. WOMACK, DANIEL T. JONES & DANIEL ROOS.

[2] Value Stream Mapping, by Karen Martin & Mike Osterling.

[3] Michel Baudins Blog- Where do Value Stream Maps" come from.

[4] Teichgräber, U. K, Bucourt, M.D., Applying value stream mapping techniques to eliminate non-added-waste for the procurement of endovascular stents,. European Journal of Radiology, Vol. 81, pp.47-52, (2012).

DOI: 10.1016/j.ejrad.2010.12.045

[5] Hines, p., Rich, N., Esain, A., Value stream mapping: A distribution industry application, Bechmarking: An International Journal, Vol. 6, No. 1, pp.60-77, (1999).

DOI: 10.1108/14635779910258157

[6] Brunt, D., From current state to future: mapping the steel to component supply chain, International Journal of Logistics: Research and Application, Vol. 3, No. 3, pp.259-271, (2000).

DOI: 10.1080/713682765

[7] Seth, D., Gupta, V., Application of value stream mapping of lean operations and cycle time reduction: An Indian case study, Production Planning & Control, Vol. 16, No. 1, pp.44-59, (2005).

DOI: 10.1080/09537280512331325281

[8] Seth, D., Seth, N., Goel, D., Application of value stream mapping (VSM) for minimization of wastes in the processing side of supply chain of cottonseed oil industry in Indian context, Journal of Manufacturing Technology Management, Vol. 19, No. 4, pp.528-550, (2008).

DOI: 10.1108/17410380810869950

[9] Chowdary, B. v., George, D., Improvement of manufacturing operations at a pharmaceutical company: A lean manufacturing approach, Journal of Manufacturing Technology Management, Vol. 23, No. 1, pp.56-75, (2012).

DOI: 10.1108/17410381211196285

[10] AR, R., Ashraf, M.A., Production flow analysis through Value Stream Mapping: A Lean manufacturing process case study, Procedia Engineering, Vol. 41, pp.1727-1734, (2012).

DOI: 10.1016/j.proeng.2012.07.375

[11] Li, H., Pan, X., A carbon emission analysis model for electronics manufacturing process based on value-stream mapping and sensitivity analysis, International Journal of Computer Integrated Manufacturing, Vol. 25, No. 12, pp.1102-1110, (2012).

DOI: 10.1080/0951192x.2012.684715