Knowing or being able to measure the “path density” at sources of communications is essential to provide fair capacity distribution between sessions in multi-hop ad hoc networks. We propose and have implemented PDP, a path density recording protocol. In this paper we describe PDP, discuss protocol design options and explain how it was piggybacked onto an existing reactive routing scheme. We ass...

The vast body of literature on dynamic requirements planning problems in make-to-order production systems assumes that demands in all periods are predefined. In many practical contexts, however, a producer has discretion to accept or deny production orders during the production planning process. That is, given a set of orders for production at a single stage in a set of time periods, along with...

In this work, we address a production and inventory routing problem for liquid oxygen supply chain comprising facilities, distribution network, resources. The key decisions of the involve levels plants, delivery schedule through heterogeneous vehicles, strategies national stock-out prevention. Due to complexity, propose two-level hybrid solution approach that solves using both exact metaheurist...

With an aim to resolve the problem of the increasing costs of supply chain in Manufacture Company, an integrated supply chain management model, driven by market demand, is brought forward in this paper, based on the analysis of existing integrated models of supply chain. The management model integrates purchase, production and sale plans with logistics plans used JIT. In order to build an integ...

Advanced production planning tools in combination with powerful computing technology have reached the eye-line of product development tools, e.g. CAD-systems. The new tools offer planning and engineering support functions on the basis of 3-dimensional models and thus can easily be enhanced with 3d visualization facilities, e.g. a power-wall or a cave. Also they allow for an integrated viewing o...

Coordination between organizations on strategic, tactical and operation levels leads to more effective and efficient supply chains. Supply chain management is increasing day by day in modern enterprises.. The environment is becoming competitive and many enterprises will find it difficult to survive if they do not make their sourcing, production and distribution more efficient. Multi-agent suppl...

Both the topics of Computer Aided Process Planning and Production Planning in the context of sheet metal air bending have been presented as standalone topics previously. This paper will focus on the interaction between both modules. Choices made by the CAPP-module seem to influence the possible gains that can be obtained in production planning and vice versa. The used procedures for both the CA...

Digital Factory (DF) can be defined as a set of software tools and methodologies allowing the design, simulation, initiation and optimization of production systems, with regards to the Product Development Process (PDP). However, it remains not widespread in the industries, essentially due to the insufficient capability to communicate between the different entities and actors implied in the PDP ...

This paper presents a new mathematical model for integrated dynamic cellular manufacturing systems and production planning that minimizes machine purchasing, intra-cell material handling, cell reconfiguration and setup costs. The presented model forms the manufacturing cells and determines the quantity of machine and movements  during each period of time. This problem is NP-hard, so a meta-heur...