This paper discusses the optimal pricing and collecting decisions in a fuzzy environment of three closed-loop dual-channel supply chain models where manufacturer produces original product from fresh materials unfashionable products. The sells products to customers using direct retail channels (forward dual channel). In reverse channel, manufacturer, third-party collector retailer individually t...

Problem definition : We examine a dynamic assignment problem faced by large wireless service provider (WSP) that is Fortune 100 company. This company manages two warranties: (i) customer warranty the WSP offers its customers and (ii) an original equipment manufacturer (OEM) OEMs offer WSP. The uses devices refurbished OEM as replacement devices, hence their operation closed-loop supply chain. D...