Yazar "Kurt, Mustafa" seçeneğine göre listele

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    AGE AND GENDER BASED WORKLOAD CONSTRAINT FOR ASSEMBLY LINE WORKER ASSIGNMENT AND BALANCING PROBLEM IN A TEXTILE FIRM
    (Univ Cincinnati Industrial Engineering, 2018) Efe, Burak; Kremer, Gul E. Okudan; Kurt, Mustafa
    This paper investigates Assembly Line Worker Assignment and Balancing Problem (ALWABP), focusing specifically on productive workload differences due to age and gender of workers, to minimize the number of workstations. Most of the published papers on assembly line balancing problems (ALBP) are focused only on the task processing times. However, this may cause an overload in work assignments for certain workers. A work-overload may cause fatigue and thus lead to a decrease in line efficiency and factory productivity, and also result in an increase in quality problems and work-related injuries. To avoid the negative implications of work-overload conditions, this paper assigns tasks among workstations without exceeding the cycle time or the age and gender-adjusted physical workload capacity (PWLC). We propose a regression model to determine age and gender-based PWLC. Six different age categories are analyzed to show the impacts of age and gender on PWLC. We propose a binary (0-1) integer linear programming (BILP) for ALWABP, where age and gender-adjusted PWLC is considered. The efficiency of the model is shown on test problems and a real-life application in a textile firm. An ALWABP is considered taking into account the processing times and physical workloads for a textile factory assembly line of 53 tasks. The numbers of stations for ALWABP without and with the physical workload in the textile firm assembly line case are 5 and 6, respectively. All workstations are balanced in terms of physical workload and processing times. The results show that advancing average age increases the number of stations (NS), and this situation triggers a reduction in line efficiency (LE) and PWLC utilization ratio.
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    Ergonomik ürün tasarımına bütünleşik bir yaklaşım
    (2018) Efe, Burak; Efe, Ömer Faruk; Kurt, Mustafa
    Günümüzde teknoloji hızlı gelişmekte ve müşterilerin ürünlerden beklentileri artmaktadır. Bu nedenle müşteriisteklerinin ön plana çıkması ve sürekli değişmesi ürün tasarımını geçmişe göre daha önemli kılmaktadır. Yaygınolarak kullanılan çamaşır makinesini üreten firmalar pazar payına sahip olabilmeleri için müşteri isteklerini gözönünde bulundurmak zorundadır. Müşteri isteklerinden birisi de ergonomik kullanım kolaylığıdır. Bu çalışmadaergonomik bir çamaşır makinesi tasarımında müşteri isteklerine ve firma kapasitesine göre teknik özellikler üzerindeiyileştirme yapılması amaçlanmıştır. Bu çalışmada kalite fonksiyon yayılımı yöntemi ve bulanık çok amaçlı doğrusalprogramlama yaklaşımı ergonomik çamaşır makinesi tasarımı için önerilmiştir. Kalite fonksiyon yayılımı müşteriistekleri ve teknik özellikler arasındaki ilişkiyi belirleyebilmektedir. Bu sonuçlara göre ergonomik bir çamaşırmakinesi tasarımı için hangi teknik özelliğin daha önemli olduğu belirlenmiştir. Ancak bu sonuç sadece müşteriisteklerine göre belirlenmiştir. Firma kapasitesi ihmal edildiği için firmanın zaman ve maliyet açısından problemlerlekarşılaşması ve pazar rekabetinde geri kalması söz konusudur. Firma ergonomik bir çamaşır makinesi tasarlarkenmüşteri isteklerinin maksimize edilmesi, maliyetin düşürülmesi, zamanın minimize edilmesi gibi farklı amaçlarasahiptir. Bu çalışma bu problemi ortadan kaldırmak için müşteri istekleri ve firma kapasitesini birlikte inceleyenZimmermann ve hibrid yaklaşım olmak üzere iki bulanık çok amaçlı doğrusal programlama yaklaşımını önermiş veelde edilen sonuçları karşılaştırmıştır.
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    Hazard analysis using a Bayesian network and linear programming
    (Taylor & Francis Ltd, 2020) Efe, Burak; Kurt, Mustafa; Efe, Omer Faruk
    In order to make a system safer, it is necessary to determine which hazard should be removed by considering the interactions of all hazards in the process. In this study, the influence of the hazards related to iron works in a construction firm is examined by Bayesian network approach. If only the most important hazard is identified and removed from the work environment, it may be erroneous to comment on the levels of the remaining hazards. A Bayesian network is proposed to remove this problem. If there is more time and budget than planned for a process, these capacities will have to be reduced in other processes. Linear programming is proposed to remove this problem. A strong decision support system has been established by combining a Bayesian network and linear programming. A construction firm application has been demonstrated using the proposed method.
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    An integrated intuitionistic fuzzy set and mathematical programming approach for an occupational health and safety policy
    (Gazi Univ, 2017) Efe, Burak; Kurt, Mustafa; Efe, Omer Faruk
    This paper aims to establish an occupational health and safety policy for three firms. This paper provides to overcome the drawbacks of traditional FMEA (failure mode and effects analysis) by using an integrated intuitionistic fuzzy multi-criteria decision making method and a linear programming. Priority value of criteria has been defined by utilizing intuitionistic fuzzy analytic hierarchy process method and the highest risky failure mode among failure modes has been found by utilizing intuitionistic fuzzy VIKOR (VIsekriterijumska optimizacija i KOm-promisno Resenje). The application of risk evaluation is conducted to show the effectiveness of the proposed method in three firms. The reliability of the risk ranking is verified by helping of a sensitivity analysis and the advantages of the proposed approach are shown by comparing with the other methods. The managers of the firm present some limitations for the occupational health and safety policy so that these constraints are solved by helping of a linear programming. The results show that destroying of the existing steel ropes during production of plaster, risks that caused from work equipment and electric shock during cutting were determined the highest risky failure modes for construction, textile and metal firms, respectively.
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    A novel approach recommendation for hazard analysis
    (Taylor & Francis Ltd, 2021) Efe, Burak; Kurt, Mustafa
    Hazard evaluation generally defines the ranking of hazards in the work environment and ignores the interaction of hazards. This article aims to overcome this drawback using a fuzzy cognitive map (FCM) approach to analyze the interaction of hazards related to sheathing tasks in a construction firm. The FCM approach can be insufficient for hazard evaluation over the long term due to certain budget and time restrictions allocated by the firm. When the firm allocates more time and budget for a process, the firm must limit the allocated time and budget for the other processes. This article aims to overcome this problem so linear programming is used to optimize the goal and resources of the firm. The article contributes to hazard evaluation of sheathing tasks in a construction firm considering the interaction of the hazards and the capacity of the firm.
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    A systematic approach for an application of personnel selection in assembly line balancing problem
    (Wiley, 2018) Efe, Burak; Kurt, Mustafa
    This paper aims to present a novel systematic approach to personnel selection. The contributions of this paper are on the multicriteria decision-making problem and the assembly line balancing problem related to personnel selection. This paper presents a novel method, which is the possibility degree based TOPSIS (technique for order preference by similarity to ideal solution) method with interval type-2 trapezoidal fuzzy (IT2TrF) numbers, as an extension of the TOPSIS method for the personnel selection problem. This paper presents the possibility mean value and possibility degree measures instead of distance measures in current TOPSIS to define a comparative index. The closeness coefficient based on the possibility degree of each alternative is calculated according to the approximate positive and negative ideal solutions. The subjective judgments of the decision makers are aggregated to calculate the weights of the criteria. The weights based on the IT2TrF number are input into IT2TrF number based the TOPSIS phase to rank the alternatives. The proposed method is applied to evaluate the personnel selection in an assembly line of a textile firm after the closeness coefficient of each personnel is determined.