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In today's competitive market, all industries such as mine industries try to increase their profit and keep their customers. Product quality improvement is the miner's most important key to success in competitive market because the mining metals price depends on their quality level. On the other hand, nowadays the management of air pollutant emissions with harmful environ‐ mental and health effects is one of the most pressing problems. This paper studies the decision behaviour and coordination issue of a mining metal three‐level supply chain with one supplier (extractor), one mineral processor and one manufacturer in which product quality improvement cost at the processor level is higher than the supplier level and at the level of the manu‐ facturer is more than the processor level. We compare the decentralized and centralized systems and identify the optimal product quality level for each supply chain member by designing a revenue sharing contract for decentral‐ ized supply chain under cap‐and‐trade regulation. Finally, numerical example shows that the designed contract not only provides a win‐win condition for all supply chain members and increases whole supply chain profit but also in‐ creases the final product quality level and reduces harmful air pollutant emis‐ sions. © 2019 CPE, University of Maribor. All rights reserved.

Product quality improvement and air pollutant emission reduction in a mining metal three-stage supply chain under cap-and-trade regulation