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Nowadays, increasing the efficiency of production and determining the tools and methods of measuring performance are the biggest challenges faced by managers by increasing competition among companies and manufacturing centers. In the aggregate production planning, along with the performance evaluation in order to reduce the waste of resources due to the common use of resources for product family production. The present study aimed to evaluate the performance in the Aggregate Production Planning (APP). In this regard, the optimal values were determined by the multi-objective Grey Aggregate Production Planning (GAPP) model, and the weights of the input and output indicators for the performance evaluation were characterized by the Step-wise Weight Assessment Ratio Analysis (SWARA) method. Further, the efficiency of Decision-Making Units (DMUs) was determined by the Ratio Efficiency Dominance (RED) model. Then, the ranking of DMUs was conducted. In the case study of automobile parts manufacturing industry in Iran, the sensitivity analysis was performed on the proposed model and its effects were evaluated. The results indicated that the proposed model had a high degree of accuracy in evaluating performance, compared to previous models, and helps managers to make better decisions to increase the efficiency and reduce the waste of resources.

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