Optimal Guaranteed Profit Margins for Both Vendors and Retailers in the Fashion Apparel Industry

Guaranteed profit margin (GPM) is one of the chargebacks that retailers frequently employ in the fashion industry. With this stipulation, the store demands a vendor's guarantee of its target mark-up rate, even in a markdown operation. This makes the retailer order too much and later liquidate a greater amount of leftovers. We propose a new GPM scheme for supply chain coordination. Specifically, if the retailer compensates the vendor for the same fraction of the joint costs as the guaranteed mark-up rate, the retailer's quantity choice results in profit maximization for the entire supply chain. Thus, the supply chain becomes fully coordinated and provides win–win outcomes for both retailer and vendor.