190,864 research outputs found
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A survey of simulation techniques in commerce and defence
Despite the developments in Modelling and Simulation (M&S) tools and techniques over the past years, there has been a gap in the M&S research and practice in healthcare on developing a toolkit to assist the modellers and simulation practitioners with selecting an appropriate set of techniques. This study is a preliminary step towards this goal. This paper presents some results from a systematic literature survey on applications of M&S in the commerce and defence domains that could inspire some improvements in the healthcare. Interim results show that in the commercial sector Discrete-Event Simulation (DES) has been the most widely used technique with System Dynamics (SD) in second place. However in the defence sector, SD has gained relatively more attention. SD has been found quite useful for qualitative and soft factors analysis. From both the surveys it becomes clear that there is a growing trend towards using hybrid M&S approaches
A General Simulation Framework for Supply Chain Modeling: State of the Art and Case Study
Nowadays there is a large availability of discrete event simulation software
that can be easily used in different domains: from industry to supply chain,
from healthcare to business management, from training to complex systems
design. Simulation engines of commercial discrete event simulation software use
specific rules and logics for simulation time and events management.
Difficulties and limitations come up when commercial discrete event simulation
software are used for modeling complex real world-systems (i.e. supply chains,
industrial plants). The objective of this paper is twofold: first a state of
the art on commercial discrete event simulation software and an overview on
discrete event simulation models development by using general purpose
programming languages are presented; then a Supply Chain Order Performance
Simulator (SCOPS, developed in C++) for investigating the inventory management
problem along the supply chain under different supply chain scenarios is
proposed to readers.Comment: International Journal of Computer Science Issues online at
http://ijcsi.org/articles/A-General-Simulation-Framework-for-Supply-Chain-Modeling-State-of-the-Art-and-Case-Study.ph
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A modular hybrid simulation framework for complex manufacturing system design
For complex manufacturing systems, the current hybrid Agent-Based Modelling and Discrete Event Simulation (ABM–DES) frameworks are limited to component and system levels of representation and present a degree of static complexity to study optimal resource planning. To address these limitations, a modular hybrid simulation framework for complex manufacturing system design is presented. A manufacturing system with highly regulated and manual handling processes, composed of multiple repeating modules, is considered. In this framework, the concept of modular hybrid ABM–DES technique is introduced to demonstrate a novel simulation method using a dynamic system of parallel multi-agent discrete events. In this context, to create a modular model, the stochastic finite dynamical system is extended to allow the description of discrete event states inside the agent for manufacturing repeating modules (meso level). Moreover, dynamic complexity regarding uncertain processing time and resources is considered. This framework guides the user step-by-step through the system design and modular hybrid model. A real case study in the cell and gene therapy industry is conducted to test the validity of the framework. The simulation results are compared against the data from the studied case; excellent agreement with 1.038% error margin is found in terms of the company performance. The optimal resource planning and the uncertainty of the processing time for manufacturing phases (exo level), in the presence of dynamic complexity is calculated
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Business process simulation: An alternative modelling technique for the information system development process
This paper discusses the idea that even though information systems development
(ISD) approaches have long advocated the use of integrated organisational views, the
modelling techniques used have not been adapted accordingly and remain focused on
the automated information system (IS) solution. Existing research provides evidence
that business process simulation (BPS) can be used at different points in the ISD
process to provide better integrated organisational views that aid the design of
appropriate IS solutions. Despite this fact, research in this area is not extensive;
suggesting that the potential of using BPS for the ISD process is not yet well
understood. The paper uses the findings from three different case studies to illustrate
the ways BPS has been used at different points in the ISD process. It compares the
results against IS modelling techniques, highlighting the advantages and
disadvantages that BPS has over the latter. The research necessary to develop
appropriate BPS tools and give guidance on their use in the ISD process is discussed
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