دانلود رایگان مقاله انگلیسی ادغام شاخص های پایداری و تولید ناب برای ارزیابی فرایندهای تولید - نشریه الزویر

Abstract

Operation management models have been developed according to changes in society's demands, such as better working conditions, clean production, recyclable and reusable products, and improving social conditions. Thus, new challenges in developing sustainable management models, particularly for manufacturing processes, have emerged. Lean Manufacturing and Value Stream Mapping (VSM) have been widely used to develop manufacturing processes without wastes in the production flow. However, current indicators of the VSM tool have not identified the economic, social and environmental factors. This work aims to propose a conceptual method to integrate a new group of sustainability indicators into the VSM tool to assess manufacturing processes. The development of sustainability indicators was performed through analysis of the assessment models of sustainability and sustainability indicators in the period of 2009 to 2014. The method was applied in three case studies, and the results demonstrated that the proposed method identified different levels of sustainability of manufacturing processes and thus enabled the development of improved scenarios. In this sense, the results contributed to the literature with the proposition of new sustainability indicators related to the manufacturing process. The case studies enabled evaluation of the interaction of a new group of sustainability indicators in different manufacturing processes.

6. Conclusions

The inclusion of the concept of sustainability in the manufacturing process through integration of Lean Manufacturing (VSM) and sustainability indicators has recently been discussed in the literature. However, the development of assessment models and indicators that effectively contribute to increasing sustainability in manufacturing processes are still in the development phase. Thus, the proposed conceptual method and the results obtained with its application in three manufacturing processes in Brazilian industry (case studies 1-3) have the main objective of contributing to this discussion and assisting in new directions for future research.

The conceptual method brings a new group of indicators associated with economic, social and environmental dimensions, which, together with the traditional indicators of VSM (Lean KPIs), seek to assess manufacturing processes and thus generate actions of continuous improvement (Kaizen) to develop sustainable manufacturing processes. The application of VSM identified the need for increased efforts in collecting data in relation to the traditional VSM. This is because information related to the economic, social and environmental dimensions are not monitored in the manufacturing process but rather by other departments, such as accounting, human resources, work safety and environmental management. The analysis of case studies allowed for identification of important characteristics that should be considered in an assessment method for improvement of the manufacturing process sustainability. All cases were sustainable from the perspective of the customer demand (Takt Time) but not sustainable in the economic, social and environmental dimensions.