تجزیه و تحلیل جریان تولید از طریق نقشه برداری جریان ارزش : یک مطالعه موردی از فرآیند تولید ناب
|کد مقاله||سال انتشار||تعداد صفحات مقاله انگلیسی||ترجمه فارسی|
|12396||2012||8 صفحه PDF||سفارش دهید|
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Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Procedia Engineering, Volume 41, 2012, Pages 1727–1734
Click ‘Lean” approach has been applied more than frequent in many manufacturing management floors over these few decades. Started in the automotive industry, sequential improvement initiatives were implemented to enhance the manufacturing practice changes. The team described a case where Lean Production (LP) principles were adapted for the process sector of an automotive part manufacturing plant. Value Stream Mapping (VSM) is one of the key lean tools used to identify the opportunities for various lean techniques. The contrast of the before and after the LP initiatives in determine managers potential benefits such as reduced production lead-time and lower work-in-process inventory. As VSM involves in all of the process steps, both value added and non-value added, are analyzed and using VSM as a visual tool to help see the hidden waste and sources of waste. A Current State Map is drawn to document how things actually operated on the production floor. Then, a Future State Map is developed to design a lean process flow through the elimination of the root causes of waste and through process improvements. An Implementation Plan then outline details of the steps needed to support the LP objectives. This paper demonstrates the VSM techniques and discusses the application in an LP initiative on a product (Front disc, D45T) case study.
Lean manufacturing is one of the initiatives that many major manufacturing plants in Asia, especially in Malaysia have been trying to adopt in order to remain competitive in an increasingly competitive global market. The focus of the approach is on cost reduction through eliminating non value added activities via applying a management philosophy which focused on identifying and eliminating waste from each step in the production chain respective of energy, time, motion and resources alike throughout a product’s value stream, known as lean. Since the birth of Toyota Production System, many of the tools and techniques of lean manufacturing (e.g., just-in-time (JIT), cellular manufacturing, total productive maintenance, single-minute exchange of dies, production smoothing) have been extensively used. This activity is more towards to Toyota Production System (TPS), a systematic approach to identify and eliminate waste activities through continuous improvement. All these effort is objectively to keep cost down and stay ahead in the race.The paper begins by providing a brief synopsis on the principles applied in this study followed by the background information on the work conducted in the project. In general view, Lean Manufacturing (LM) is an arrangement of techniques and activities for running a production industries or service operation. Depending on the application, the techniques and activities would respectively differ accordingly. Nevertheless, they have the same core principle: the elimination of all non-value-adding activities and waste from the business. Types of waste that outlined in the project include the following 7 Muda . Lean was chosen as the key ingredients in the improvement program objectively to suit the purpose of waste removal. Lean application is guided by 5 simple steps starting from identifying the value of process,identifying the process value stream, focusing on the process flow, configurations of the pull factor and work towards process perfection . The most regular quality gurus such as Toyoda, Shigeo Shingo, and Taiichi Ohno are those responsible in formulating a new, disciplined, process-oriented system, which is known today as the ‘‘Toyota Production System,’’ or ‘‘Lean Manufacturing’’. By applying tools that could identify major sources of waste, and then using tools such as production smoothing approach, setup time reduction and others to eliminate waste, the project team applied the following related lean tools such as Kanban, Total Preventive Maintenance (TPM), Setup time reduction, Yamazumi chart,Total quality management (TQM), 5S and VSM: A collection of all actions (value added as well as non-value-added) that are required to bring a product through the main flows.The objective of this project is to use a case-based approach to determine how lean manufacturing tools are utilized to help the process industry eliminate waste, maintain better inventory control, improve product quality, and capable of better operational control. A Small Medium Industries (SMI) is a local company referred to demonstrate the approach followed is referred to as SMC throughout this paper. In SMC, the team adopted VSM to map the current operating state for SMC. In case of before LP is implemented, VSM mapping is used to identify sources of waste and to discover the appropriate lean tools for reducing the waste. A later map is then established to highlight the improvement in the area and the applied lean tools.
نتیجه گیری انگلیسی
The use of the VSM improved the approach in LP initiatives as it reveals obvious and hidden waste that affected the productivity of D45T production. There is a significant amount of the time products spent on the production system usually was waiting and non-value added. Quantitative evidence showed that many of the Lean tools have an expected impact related to the reduction of this waiting time. The evaluation of these improvements through the use of the CT evaluation highlights the economic impact of time improvements. The VSM applied to assess the expected impact of a change in the production process resulted in savings (lower rejection rates) and to a certain extent, a positive view was due to the fact that there were substantial gaps between standardized work and real work – this gap meant that workers did not follow strictly assembly standards and improvising the SOP could be a key driver in continuous improvement sustainability on the production floor as operators are fully aware on the long-term commitment to practice Lean.