Abstract The Traveling Purchaser Problem (TPP) has been one of the most studied
generalizations of the Traveling Salesman Problem. In recent decades, the TPP attracted the …

A systematic and organized overview of various existing transportation problems and their
extensions developed by different researchers is offered in the review article. The article has …

In this paper, we study the procurement problem faced by a buyer who needs to purchase a
variety of goods from suppliers applying a so-called total quantity discount policy. This policy …

In this work, we study a supplier selection and routing problem where a fleet of
homogeneous vehicles with a predefined capacity is available for procuring different …

We introduce a problem where a fleet of vehicles is available to visit suppliers offering
various products at different prices and quantities, with the aim to select a subset of suppliers …

In direct marketing, companies use sales campaigns to target their customers with
personalized product offers. The effectiveness of direct marketing greatly depends on the …

We focus on an extension of the assignment problem with additional conflict (pair)
constraints in conjunction with the assignment constraints and binary restrictions. Given a …

In the current business environment of competition shifting from company-to-company to
supply chain against supply chain, there is an increasing need for logistics providers (LSP) …

We consider a variant of the maximum flow problem on a given directed graph where some
arc pairs are incompatible or conflicting; in other words, they are not allowed to carry positive …

Transportation system approximately contributes one-seventh of total world pollution, which
demands to be minimized. Against some costs, developing countries have recently …