ABSTRACT Manufacturing companies are striving for more environment-friendly operations and products, creating an increased need for a balance between environment friendliness and efficiency gains. This can be done by integrating and implementing lean and green practices simultaneously. To attain this objective, this paper presents a green-modified value stream mapping model, which uses carbon efficiency and carbon emission as evaluation indicators. The model identifies the integrating level of time flow, energy flow, material flow, and transportation flow at each phase of the production process from the perspective of seven wastes and converts them into carbon emission flow. The proposed framework can visualise and assess the manufacturing process performance and help overcome the challenges associated with integrating and implementing lean and green practices. In addition, a mathematical model of carbon efficiency is established to analyse and calculate carbon emission flow of all types of wastes to identify opportunities for improvements in eliminating wastes. The effectiveness of this method is demonstrated with a case study of a manufacturing unit producing metal stamped parts. Further studies are required to test the proposed framework under various fields including other manufacturing fields to improve the practical validity and expand the application scope.

中文翻译：

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应用绿色修正价值流图整合和实施精益和绿色实践：案例研究

摘要 制造企业正在努力打造更环保的运营和产品，从而越来越需要在环境友好性和效率收益之间取得平衡。这可以通过同时整合和实施精益和绿色实践来实现。为实现这一目标，本文提出了一种以碳效率和碳排放为评价指标的绿色修正价值流映射模型。该模型从七种废物的角度识别了生产过程各个阶段的时间流、能量流、物质流和运输流的整合水平，并将其转化为碳排放流。提议的框架可以可视化和评估制造过程性能，并帮助克服与集成和实施精益和绿色实践相关的挑战。此外，还建立了碳效率数学模型，对各类废弃物的碳排放流量进行分析和计算，以发现废弃物消除的改进机会。该方法的有效性通过一个生产金属冲压件的制造单位的案例研究得到证明。需要进一步研究以在包括其他制造领域在内的各个领域测试所提出的框架，以提高实际有效性并扩大应用范围。建立碳效率数学模型，分析和计算各类废弃物的碳排放流量，找出改善废弃物消除的机会。该方法的有效性通过一个生产金属冲压件的制造单位的案例研究得到证明。需要进一步研究以在包括其他制造领域在内的各个领域测试所提出的框架，以提高实际有效性并扩大应用范围。建立碳效率数学模型，分析和计算各类废弃物的碳排放流量，找出改善废弃物消除的机会。该方法的有效性通过一个生产金属冲压件的制造单位的案例研究得到证明。需要进一步研究以在包括其他制造领域在内的各个领域测试所提出的框架，以提高实际有效性并扩大应用范围。