In this paper, we present a survey on vehicle routing problems with multiple commodities. In
most routing problems, only one commodity is explicitly considered. This may be due to the …

This paper addresses the well-known traveling purchaser problem (TPP) considering
restrictions related to perishable food, which is called the traveling purchaser problem for …

In this paper, we propose a multi-vehicle clustered traveling purchaser problem
(MVCluTPP). Here, two types of procurement planning are proposed. In the first setup, the …

The traveling purchaser problem (TPP) is a generalization of the well-known traveling
salesman problem, in which a list of products with different quantities has to be purchased …

In the reverse logistics recycling process, considering the diversity of recycling types, a
variety of vehicle models are used to meet the reverse logistics recycling requirements …

Sometimes measurements taken to increase resource efficiency do not reach the estimated
magnitude, as part of the reduction vanishes due to the reaction of entities to the changed …

In developing countries, rural and semi-urban markets remain open for a particular period of
time in a day, and items' availabilities and prices vary within the opening hours of a market …

This study extends the well-known traveling purchaser problem (TPP) by considering a
transportation time limit of perishable food in cold-chain logistics. The problem is called the …

The decision of whether to collaborate with one or multiple sources is a crucial challenge in
the supply chain. This decision involves considering various criteria, including price and …

We consider an integrated planning problem that combines purchasing, inventory, and
inbound transportation decisions in an agri-food supply chain where several suppliers …