Yazar "Polat, Ulviye" seçeneğine göre listele

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    Öğe
    A new approach for environmental risk assessment
    (Taylor & Francis Inc, 2018) Kokangul, Ali; Polat, Ulviye; Dagsuyu, Cansu
    Environmental problems, such as global warming, the limited supply of sustainable energy, the depletion of natural resources, hazardous emissions released into the atmosphere and waste, are increasing global concerns. Therefore, individuals, communities, and businesses need to address environmental protection and sustainability. Environmental impact assessments are needed to identify, mitigate, and control aspects that affect the environment or a company's products, services, or activities. In this study, a general environmental aspect and impact assessment approach, which can be applied to any company that is involved in the production or service sector, is created. An environmental impact pattern that consists of 10 main and 32 sub-categories was formed based on the ISO 14001, environmental studies and field applications. The developed approach was applied to the dyeing units of a manufacturing firm. Sixteen environmental aspects were identified and assessed using the environmental impact template via the environmental failure mode and effect analysis (E-FMEA) method. The developed-approach can be applied to each sector, which will enable us to perform a detailed analysis of the environmental aspects in the environmental impact category. This approach provides a checklist for the environmental impact studies of businesses and has been pioneered as an effective method for company resources to improve their environmental performance.
  • [ X ]
    Öğe
    Integrated process capability and multi-criteria decision-making approach
    (Springer, 2021) Dagsuyu, Cansu; Polat, Ulviye; Kokangul, Ali
    The surface protection processes are performed for metals in order to improve paint adhesion and dye yield, increase corrosion strength, and eliminate the necessity of re-processing. The desired quality to be received in the parts processed in the surface protection processes which constitutes multiple sub-processes can be obtained only if the sub-processes are conducted effectively. In this study, the criteria being effective on surface protection processes have been identified, and an approach based on the Analytic Hierarchy Process (AHP) and the process capability (C-p) values have been developed in order to identify the significance level of these criteria on the surface quality. The approach developed has been applied to the immersion phosphating process of a large-scale company. First of all, the significant levels of sub-processes were identified through the AHP method based on the quality parameters followed by the company. Then the C-p values were calculated based on the measurement criteria in order to understand the competence of each sub-process. Important subprocesses affecting the final quality of the immersion phosphating process have been identified by means of the PPN (Process Priority Number) index developed by using the AHP results and C-p values.