New discrete-event formulations of physics simulation models are emerging that can outperform models based on traditional time-stepped techniques. Detailed simulation of the Earth’s magnetosphere, for example, requires execution of sub-models that are at widely differing timescales. In contrast to time-stepped simulation which requires tightly coupled updates to entire system state at regular t...

According to Shapiro (2007), simulation models permit the study of the dynamic behaviour of a supply chain. Simulation models can describe how all parts of the supply chain will operate over time in respect to a set of parameters and policies defined by managers/analysts. Understanding the dynamics of the supply chain in a safe computer environment is the main value of computer simulation model...

Today, discrete-event simulation (DES) use in the manufacturing industry has become widespread, but far from all companies use this technology.Often simulation is used on a `one-shot' basis only, or as a standalone tool, reflecting a low level of integration. At the same time, a majority of companies do not use simulation at all. It is argued here that these companies lack methodologies for ado...

this paper presents the formulation and solution of the combinatorial multi-mode resource constrained multi-project scheduling problem. the focus of the proposed method is not on finding a single optimal solution, instead on presenting multiple feasible solutions, with cost and duration information to the project manager. the motivation for developing such an approach is due in part to practica...

Computer based discrete event simulation (DES) is one of the most commonly used aids for the design of automotive manufacturing systems. However, DES tools represent machines in extensive detail, while only representing workers as simple resources. This presents a problem when modelling systems with a highly manual work content, such as an assembly line. This paper describes research at Cranfie...

Event Graphs are a simple and elegant language-independent way of representing a Discrete Event Simulation (DES) model. In this paper we propose an extension to basic Event Graphs that enables small models to be encapsulated in reusable modules called Listener Event Graph Objects (LEGOs). These modules are linked together using a design pattern from Object Oriented Programming called the “liste...

Discrete Event Simulation (DES) is a very popular simulation technique in Operational Research. Recently, there has been the emergence of another technique, namely Agent Based Simulation (ABS). Although there is a lot of literature relating to DES and ABS, we have found less that focuses on exploring the capabilities of both in tackling human behaviour issues. In order to understand the gap bet...

by KUSHEL RAI BELLIPADY (Under the Direction of John A. Miller) ABSTRACT The need for interoperability arises in the discipline of simulation and modeling, particularly when the components of a simulation environment need to communicate with each other or communicate with outside entities including other simulation environments. Ontologies can be used to facilitate this interoperability between...

Most discrete event simulation environments are based on a process-oriented, and therefore multi-threaded paradigm. This results in simulation environments that are very hard to distribute over more computers, and not easy to integrate with scattered external information sources. The architecture presented here is based on the event-based DES paradigm which is implemented by scheduled method in...