Work-in-Progress Inventory Control Case Study in Lean Management

  • Abstract
  • Keywords
  • References
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  • Abstract

    Increasing the rate of converting raw material into finished product and delivering it on time is a main driver for each manufacturing industry to achieve continuous improvement in its business operation.  This case study demonstrates the improvement of the work-in-progress inventory in a non-lean company seeking to adopt lean management.  Introducing the value stream mapping (VSM) lean technique to identify the waste in the current production operation. A selection of lean tools such as Kanban card, supermarket racking and one-piece flow are applied to control and monitor the WIP inventory after justification of the factors (process cycle time, production facilities layout and facilities capacity allocation) that influence the change from the current production operation situation.

    The construction of the current VSM had identified the major waste in WIP inventory handling in the final fabrication process.  The fluctuation of WIP inventory has been resolved by the implementation of supermarket racking; therefore, an improvement base for WIP inventory control has been established.  Throughout this study, the lean management concept had been fostered into the production floor team and will continue developing to the organization.


  • Keywords

    Continuous improvement, production system, work-in-progress, value stream mapping, lean management

  • References

      [1]. Singh Harwinder, Singh Amandeep, Application of lean manufacturing using value stream mapping in an auto‐parts manufacturing unit, Journal of Advances in Management Research 10(1)(2013) 72-84.

      [2]. I. C. Diaz, et al.,Cycle time study of wing spar assembly on aircraft factory, Procedia Manufacturing 13(2017) 1019-1025.

      [3]. Oladipupo A. Olaitan, John Geraghty, Evaluation of production control strategies for negligible‐setup, multi‐product, serial lines with consideration for robustness, Journal of Manufacturing Technology Management 24(3) (2013) 331-357.

      [4]. C. Madhusudhana Rao, K. Prahlada Rao, Inventory turnover ratio as a supply chain performance measure, Serbian Journal of Management 4(I) (2009) 41-50.

      [5]. L. Cuatrecasas-Arbós, et al., Monitoring processes through inventory and manufacturing lead time, Industrial Management & Data Systems 115(5) (2015) 951-970.

      [6]. A. M. Deif, H. ElMaraghy, Impact of Dynamic Capacity Policies on WIP Level in Mix Leveling Lean Environment, Procedia CIRP 17 (2014) 404-409.

      [7]. J. Fang, et al., Event-driven multi-agent ubiquitous manufacturing execution platform for shop floor work-in-progress management, International Journal of Production Research 51(4) (2013) 1168-1185.

      [8]. I. S. Lasa, et al.,An evaluation of the value stream mapping tool, Business Process Management Journal 14(1) (2008) 39-52.

      [9]. P. Magu, et al., Path Process Chart – A Technique for Conducting Time and Motion Study, Procedia Manufacturing 3 (2015) 6475-6482.

      [10]. F. Morlock, et al., Teaching Methods-Time Measurement (MTM) for Workplace Design in Learning Factories, Procedia Manufacturing 9 (2017) 369-375.

      [11]. A. Naufal, et al., Development of the Kanban System at a Local Manufacturing Company in Malaysia–Case Study, Procedia Engineering 41 (2012) 1721-1726.

      [12]. H. T. Papadopoulos, M. I. Vidalis, Minimizing WIP inventory in reliable production lines, International Journal of Production Economics 70(2) (2001) 185-197.

      [13]. P. Ruiz‐de‐Arbulo‐Lopez, et al., Lean manufacturing: costing the value stream, Industrial Management & Data Systems 113(5) (2013) 647-668.

      [14]. M.M. Savino, A. Mazza, Kanban-driven parts feeding within a semi-automated O-shaped assembly line: a case study in the automotive industry, Assembly Automation 35(1) (2015) 3-15.

      [15]. T. P. Librelato, et al., A process improvement approach based on the Value Stream Mapping and the Theory of Constraints Thinking Process, Business Process Management Journal 20(6) (2014) 922-949.

      [16]. Huseyin Selcuk, Menmet Bulet Durmusoglu, Advances in assembly line parts feeding policies: a literature review, Assembly Automation 35 (1) (2015) 57-68.

      [17]. Taiichi Ohno, Beyond Large-Scale Production, CRC Press, New York, 1990.

      [18]. Zhang, Y. et al., Real-time work-in-progress management for smart object-enabled ubiquitous shop-floor environment, International Journal of Computer Integrated Manufacturing 24(5) (2011) 431-445.

      [19]. Ziengs, N., et al., Placement of effective work-in-progress limits in route-specific unit-based pull systems, International Journal of Production Research 50(16) (2012) 4358-4371.




Article ID: 16770
DOI: 10.14419/ijet.v7i3.4.16770

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