Coordinate or collaborate? Reducing food waste in perishable-product supply chains
研究了杂货零售商要求制造商提供长剩余保质期产品（MLOR协议）对减少食物浪费的效果，分析了合作设定MLOR水平与通过合同协调供应链两种策略，发现协调不一定最优，合作对实体零售商更有利。
Reducing food waste in supply chains (SCs) with multiple decision-makers is challenging. A common approach grocery retailers use to reduce waste is requiring manufacturers to only send products with a long remaining shelf life (“minimum life on receipt”-MLOR). However, its impact on manufacturers remains unclear. To evaluate the effectiveness of MLOR agreements on food waste, we investigate two strategies: (1) collaborating on setting the MLOR level and (2) coordinating the SC via contract. Through collaboration, we analytically show that if the MLOR agreement doesn’t demand solely fresh products, it raises manufacturer profits, enabling potential wholesale price reduction. This might incentivize retailers to collaborate to reduce the MLOR level. We demonstrate that the coordinating strategy can reduce waste in the SC and is most beneficial when the wholesale price is high, and the issuing policy is FIFO. We introduce possible coordination contracts and show that in coordinated SCs, manufacturers always provide the highest MLOR level without requiring any restrictive MLOR agreements. Governments mainly focus on reducing retail waste and promoting retailers to request higher MLOR. However, these efforts can backfire by creating more waste for manufacturers. Reducing the MLOR allows retailers to negotiate lower wholesale prices, increasing profitability while reducing waste. Although SC coordination is known for reducing inefficiency, it may not be the best strategy for reducing waste, especially when the issuing policy is more LIFO than FIFO. Specifically, while coordination might be a better strategy for online retailers, collaboration can be a better strategy for brick-and-mortar retailers. • We show properties under which perishable-product supply chains can be coordinated. • MLOR levels significantly affect profitability and waste in food supply chains. • MLOR agreements are not necessarily beneficial in reducing supply chains’ waste. • In coordinated supply chains, retailers always impose the most restrictive MLOR level. • MLOR collaboration is more critical for brick-and-mortar than for online retailers.