We study a single-product fluid-inventory model in which the procurement price of the product fluctuates according to a continuous time Markov chain. We assume that a fixed order price, in addition to state-dependent holding costs are incurred, and that the depletion rate of inventory is determined by the sell price of the product. Hence, at any time the controller has to simultaneously decide ...

extensive research has been devoted to resource constrained project scheduling problem. however, little attention has been paid to problems where a certain time penalty must be incurred if activity preemption is allowed. in this paper, we consider the project scheduling problem of minimizing the total cost subject to resource constraints, earliness-tardiness penalties and preemption penalties, ...

Auction is a mechanism of selling distinct assets that can be both physical objects and virtual objects. Examples of virtual objects are the rights to use assets like airport time slots and FCC spectrum, or to service truckload delivery routes in a transportation network. Under some situations bidding on combinations of objects can render lower total price compare with bidding the objects one a...

Every project involved in oil and gas fabrication erected onshore usually experiences cost overruns if lack of monitoring. This overrun is closely related to the use machines, manpower, methods, money, materials (5M) order a where all these resources require good financial cycle. However, often occur due improper management planned resource allocation from 5M. Therefore, this study was aimed ex...

Internet banking is becoming increasingly popular throughout the world due to its convenience and low cost. The security issues surrounding internet banking are always the focus of both banks and customers. Although much emphasis has been laid on advanced security technology and the human factor in security, there is little research that aims to fully understand customer awareness of internet b...

To solve the procurement conflict between supplier and manufacturer, this paper proposes a collaborative planning model and an adaptive negotiation method by integrating intelligent multi-agent technology. First, a collaborative procurement, inventory and production planning model is built using the multi-level multi-item capacitated lot sizing problem method. Then the particle swarm optimizati...