Improving the Efficiency of Automobile production lines by Using Network Data Envelopment Analysis and Modeling

Subject Areas : تحقیق در عملیات

مهدی کمیجانی ¹ , Amir Gholam Abri ^{2 *} , نقی شجاع ³ , احمد شایان نیا ⁴

1 - Department of industrial management, Firoozkooh branch, Islamic azad university, Firoozkooh, Iran
2 - گروه ریاضی، واحد فیروزکوه، دانشگاه آزاد اسلامی، فیروزکوه، ایران
3 - Department of mathematics, Firoozkooh branch, Islamic azad university, Firoozkooh, Iran,
4 - Department of industrial management, Firoozkooh branch, Islamic azad university, Firoozkooh, Iran,

Received: 2022-07-04 Accepted : 2022-12-07 Published : 2024-09-25

Keywords: الگویابی, تحلیل پوششی داده‌های شبکه‌ای, کارایی, ارزیابی عملکرد, بهره‌وری,

Abstract :

Improving the efficiency of production lines is of particular importance due to market demand and economic constraints. In this research, Network Data Envelopment Analysis with undesirable factors has been used as the main method to analyze automobile industry and evaluate the efficiency in 5 production lines. At first, the efficiency of the production lines is calculated.Then, the reference set as the most efficient DMUs making the models will be obtained and so,as the model, cleared which factors of inefficient unit is modeled based on the efficient unit to increase their efficiency. Finally, the necessary matters to change the amount of components are presented in the reference set. The results obtained represens that the unit of efficiency in production line E is more efficient than the other lines. The main reasons of the inefficiency in production lines are poor access rate of the defects reported to after-sales service network at the first quarter after car delivery, the access rate of customer protection, quality defects, repairs and rework, operator skill, inventory under repair and the average V1 + V2 for the supplier.

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