كاربرد زنجيره‌بلوكي در زنجيره تامين سبز با درنظرگرفتن خدمت ضمانت: يك رويكرد نظريه بازي

With increasing environmental concerns an‎d growing stakeholder expectations for transparency an‎d sustainability, supply chains have been forced to adopt green strategies to reduce environmental impacts an‎d increase efficiency. The present study develops a competitive green supply chain model including one manufacturer an‎d a population of retailers within evolutionary game theory, in which the decisions of retail price, product greenness level, extended warranty price an‎d period, an‎d the level of investment in blockchain technology are analyzed simultaneously. In the proposed model, blockchain, by increasing transparency, makes the product greenness claim an‎d the validity of warranty commitments reliable for customers, an‎d thus has a positive effect on deman‎d. The costs of investment in greenness an‎d blockchain technology, as well as the cost of providing warranty services, are also included in the profit functions of chain members. By analyzing three different competitive scenarios an‎d extracting optimal equilibrium values, the consequences of choosing different investment an‎d pricing levels by the players are analyzed. Also, in the proposed evolutionary game theory model, the long-term sustainable evolutionary strategy for retailers is analyzed. Numerical results show that implementing blockchain an‎d providing extended warranties, if the associated costs are at an acceptable level, can improve the retailers’ market share by 33% an‎d increase the manufacturer’s profit by 31%. Also, investing in greenness of the product, even despite the increased costs, improves the long-term profitability of the chain due to the increase in deman‎d an‎d the positive impact on the manufacturer’s reputation. The findings help managers to determine the optimal level of green investment, the optimal amount of blockchain use, an‎d the optimal duration of warranty service in competitive conditions.

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