ارزیابی عملکرد تامین‎‍کنندگان لارج با رویکرد تکنیک فرصت از دست ‎‍رفته بر مبنای فاصله در فضای قطبی oplo-pocod

امروزه یکی از مسئولیت‎‍های مهم مدیران سازمان، ارزیابی و انتخاب تامین‎‍کننده است. انتخاب صحیح تامین‎‍کنندگان مواد و خدمات، تاثیرات مثبتی در عملکرد کلی سازمان دارد. یکی از مهم‌ترین بخش‎‍های زنجیرۀ تامین صنعت تولید فرآورده‎‍های نفتی به‌طور عام و صنعت تولید قیر به‌طور خاص، پیمانکاران حمل هستند که وظیفۀ تحویل محصول به مشتری (به‌عنوان توزیع‎‍ کننده) را دارند. در این مطالعه، عملکرد پیمانکاران حمل طرف قرارداد شرکت نفت جی بر مبنای مشخصه‎‍ها و الزامات مربوط به زنجیرۀ تامین لارج ارزیابی‌ شده است. معیارهای منتخب برای ارزیابی عملکرد پیمانکاران‌ اشاره‌شده با توجه به پیشینۀ تحقیق و نظر کارشناسان صنعت (‌روش دلفی فازی) مشخص شدند. در مرحلۀ بعد، وزن معیارها طبق نظر خبرگان و با استفاده از تکنیک بهترین بدترین به دست آمد. درنهایت بر‌اساس تکنیک جدید فرصت از دست ‎‍رفته بر مبنای فاصله در فضای قطبی (oplo -pocod)، ارزیابی و رتبه‎‍بندی پیمانکاران در بررسی موردی پژوهش انجام شد. نتایج حاصل از سوی اعضای گروه خبره نیز‌ تایید و استقبال شد و این از اعتبار روش جدید رتبه‎ ‍بندی حکایت داشت.

evaluating the performance of large suppliers using opportunity loss-based polar coordinate distance (oplo-pocod technique)

purpose: to effectively manage supply chain processes, various strategies and approaches have been proposed, particularly four key strategies: lean, agile, resilient, and green supply chain strategies. this study assesses the performance of transportation contractors linked to the jey oil refining company, evaluating them based on the characteristics and requirements relevant to a large supply chain.design/methodology/approach: the research methodology is based on practical objectives and utilizes survey data collection techniques. methodologically, the study employs an analytical-descriptive approach. the statistical population for this research consists of transportation contractors linked to jey oil refining company for the ranking component. furthermore, the design and refinement of performance evaluation indicators involve managers, experts, and specialists from the company’s logistics department. the current study applies fuzzy delphi methods, the best-worst technique, and the lost opportunity technique based on distance in polar coordinates (oplo pocod).findings: according to the findings, the criteria of a1, i.e., ‘the amount of monthly withdrawal of the product compared to the amount of remittances’ and a3, i.e., ‘reduction in delay times’ were identified with the highest (0.12) and lowest (0.05) weights, respectively. additionally, contractor 1 was ranked first with the lowest degree of probability of achievement (poa) and the highest degree of liquidity (dol).research limitations/implications: given the comprehensive nature of the criteria associated with the extensive approach to multi-criteria decision-making, it is advisable that researchers utilize this framework as a valuable tool for evaluating and ranking supply chain facilities. this can be accomplished by either integrating additional criteria beyond those outlined in the current study or by adjusting the existing criteria. acknowledging the multitude of studies and methodologies available for assessing and ranking alternatives in multi-criteria decision-making problems and uncertain contexts, it would be advantageous to compare the method proposed in this research with other established approaches. furthermore, future research should investigate the significance and impact of various criteria on the final outcomes of this study to validate the robustness of the approach and to perform a sensitivity analysis. it is also suggested that researchers, particularly in situations where data are primarily qualitative, consider employing the oplo-pocod technique, which is based on uncertain fuzzy sets—specifically interval-valued fuzzy sets, intuitionistic fuzzy sets, and neutrosophic fuzzy sets.practical implications: based on the criteria and sub-criteria established in this study for evaluating logistics service providers, it is possible to assess the performance of transportation contractors. consequently, this research can aid logistics managers in evaluating the efficiency of their logistics systems and enable them to select preferred suppliers based on comprehensive criteria. furthermore, it offers insights for adjusting purchasing strategies and enhancing interactions with suppliers. by employing the methods and criteria outlined in this study, logistics managers will be empowered to evaluate the performance of the service providers under their oversight and, if necessary, facilitate improvements in areas where suppliers may be underperforming.originality/value: the oplo-pocod method presents a novel approach to addressing multi-criteria decision-making (mcdm) problems. this method incorporates the concept of lost opportunities, transforming them into distances in polar coordinates, thereby enabling a more comprehensive evaluation of available options. overall, the oplo-pocod method provides a distinctive perspective on mcdm challenges by integrating lost opportunity and polar coordinate distance. this integration can potentially enhance the accuracy and efficacy of decision-making across diverse fields.