Applying lean manufacturing system to improving productivity of airconditioning coil manufacturing
Tóm tắt
The main objective of this investigation was to implement lean manufacturing system (LMS) to improve productivity of airconditioning coil manufacturing at Blue Star Limited. LMS was successfully employed to improve coil manufacturing productivity or output by 77 % or from 121 coils to 214 coils per shift. The LMS tools; such as value stream mapping, single minute exchange of die, and Kaizen were employed to reduce the setup time of coil expander machine from 60 to 20 min, an improvement of 67 %. The increase in percentage value addition (%VA) of the coil shop was from 5 to 12 %, an improvement of 140 %. The improvement, especially in coil expander machine was achieved through Kaizen (continuous improvement) targeting design and work method changes. The specific innovative design changes or improvements made in the expander machine to reduce the setup time included the application of: (1) gear rack and gear pinion mechanism, (2) spring and cam and lever mechanism, and (3) one touch mechanism in the various components of the machine. Many method Kaizens were also proposed to simplify the setup procedure by eliminating waste (muda) from the setup of expander. Other benefits were obtained through reduction of work-in-process inventory, which in turn reduced the shop floor congestion and coil damage due to extra coil handling and improved workplace safety.
Tài liệu tham khảo
Abdulmalek FA, Rajgopal J (2007) Analyzing the benefits of lean manufacturing and value stream mapping via simulation: a process sector case study. Int J Prod Econ 107(1):223–236
Bamber L, Dale BG (2000) Lean production: a study of application in a traditional manufacturing environment. Prod Plan Control 11(3):291–298
Chan FTS, Lau HCW, Ip RWL, Chan HK, Kong S (2005) Implementation of total productive maintenance: a case study. Int J Prod Econ 95:71–94
Das B (1986) Operator training in a repetitive production task: a comprehensive approach. Int J Prod Res 24(6):1427–1437
Das B (2001) Ergonomics consideration and management action in the implementation of industrial robots. Hum Factors Ergon in Manuf 6(3):347–361
Dombrowski U, Crespo I, Zahn T (2010) Adaptive configuration of a lean production system in small and medium-sized enterprises, production engineering. Res Dev 4:341–348
Krishnan PV, Vijaya RB, Pillai MK (2011) Work-in-process optimization through lean manufacturing. Int J Econ Res 2(2):19–25
Liker JK (2003) The Toyota way. McGraw-Hill, Wisconsin
Liker JK (1998) Becoming lean. Productivity Press, Portland
McDonald T, Van Aken EM, Rentes AF (2002) Utilizing simulation to enhance value stream mapping: a manufacturing case application. Int J Logistics-res Appl 5(2):213–232
Monden Y (1998) Toyota production system: an integrated approach to just-in-time, 3rd edn. Engineering and Management Press, Norcross
Moreira AC and Pais GCS (2011) Single minute exchange of die: a case study implementation. J Technol Manag Innov 6(1):129–146
Nickels WG, McHingh JH, McHugh SM, Berman PD, Cossa R (2008) Understanding of Canadian business, 4th edn. McGraw Hill, Toronto
Niebel B, Freivalds A (2003) Methods, standards and work design, 11th edn. McGraw-Hill, New York
Ohno T (1988) Toyota production system: beyond large-scale production. Productivity Press, New York
Pattanaik LN, Sharma BP (2009) Implementing lean manufacturing with cellular layout. Int J Adv Manuf Technol 42:772–779
Ramesh V, Sreenivasa Prasad KV, Srinivas TR (2011) Implementation of a lean model for carrying out value stream mapping in a manufacturing industry. J Ind Syst Eng 2(3):180–196
Singh B, Garg SK, Sharma SK (2011) Value stream mapping: literature review and implication for Indian industry. Int J Adv Manuf Technol 53:799–809
Soderquist K, Motwani J (1999) Quality issues in lean production implementation: a case study of a French automotive supplier. Total Qual Manag 10(8):1107–1122
Vinodh S, Arvind KR, Somanaathan M (2011) Tools and techniques for enabling sustainability through lean initiatives. Clean Techn Environ Policy 13:469–479
Wickramasinghe D, Wickramasinghe V (2011) Perceived organizational support, job involvement and turnover intention in lean production in Sri Lanka. Int JAdv Manuf Technol 55:817–830
Womack JP, Jones DT (1996) Lean thinking. Simon and Schuster, New York
Womack JP, Jones DT (2003) Lean thinking: banish waste and create wealth in your corporation. Simon & Schuster, New York