Exploring the Dynamic Costs of Process-aware Information Systems through Simulation

Introducing process-aware information systems (PAIS) in enterprises (e.g., workflow management systems, case handling systems) is associated with high costs. Though cost evaluation has received considerable attention in software engineering for many years, it is difficult to apply existing evaluation approaches to PAIS. This difficulty particularly stems from the inability of these techniques to deal with the complex interplay of the many technological, organizational and project-driven factors which emerge in the context of PAIS engineering projects. In response to this problem this paper proposes an approach which utilizes simulation models for investigating costs related to PAIS engineering projects. We motivate the need for simulation, discuss the design and execution of simulation models, and give an illustrating example

Computational simulation for concurrent engineering of aerospace propulsion systems

Results are summarized for an investigation to assess the infrastructure available and the technology readiness in order to develop computational simulation methods/software for concurrent engineering. These results demonstrate that development of computational simulation methods for concurrent engineering is timely. Extensive infrastructure, in terms of multi-discipline simulation, component-specific simulation, system simulators, fabrication process simulation, and simulation of uncertainties--fundamental to develop such methods, is available. An approach is recommended which can be used to develop computational simulation methods for concurrent engineering of propulsion systems and systems in general. Benefits and issues needing early attention in the development are outlined

Designing Effective Simulation Games for Active Learning in Systems Engineering

Simulation games have been an effective method of teaching, especially for Systems Engineering concepts. The hands-on activities facilitate active, experiential, and collaborative learning with fun elements. Many simulation games have been developed in the past, but not all are equally effective. How to design a simulation game that is effective and easy to implement? This paper attempts to identify the key design factors that affect the performance of simulation games for teaching systems engineering concepts. By reviewing designs of several existing simulation games, important design factors were identified and verified. With these factors, a more effective way to design new simulation games has been suggested.Cockrell School of Engineerin

Simulation Models for Analyzing the Dynamic Costs of Process-aware Information Systems

Introducing process-aware information systems (PAIS) in enterprises (e.g., workflow management systems, case handling systems) is associated with high costs. Though cost estimation has received considerable attention in software engineering for many years, it is difficult to apply existing approaches to PAIS. This difficulty particularly stems from the inability of existing estimation techniques to deal with the complex interplay of the many technological, organizational and project-driven factors which emerge in the context of PAIS. In response to this problem, this paper proposes an approach which utilizes simulation models for investigating the dynamic costs of PAIS engineering projects. We motivate the need for simulation, discuss the development and execution of simulation models, and give an illustrating example. The present work has been accomplished in the EcoPOST project, which deals with the development of a comprehensive evaluation framework for analyzing PAIS engineering projects from a value-based perspective

How Should Life Support Be Modeled and Simulated?

Why do most space life support research groups build and investigate large models for systems simulation? The need for them seems accepted, but are we asking the right questions and solving the real problems? The modeling results leave many questions unanswered. How then should space life support be modeled and simulated? Life support system research and development uses modeling and simulation to study dynamic behavior as part of systems engineering and analysis. It is used to size material flows and buffers and plan contingent operations. A DoD sponsored study used the systems engineering approach to define a set of best practices for modeling and simulation. These best practices describe a systems engineering process of developing and validating requirements, defining and analyzing the model concept, and designing and testing the model. Other general principles for modeling and simulation are presented. Some specific additional advice includes performing a static analysis before developing a dynamic simulation, applying the mass and energy conservation laws, modeling on the appropriate system level, using simplified subsystem representations, designing the model to solve a specific problem, and testing the model on several different problems. Modeling and simulation is necessary in life support design but many problems are outside its scope

Fighter aircraft flight control technology design requirements

The evolution of fighter aircraft flight control technology is briefly surveyed. Systems engineering, battle damage considerations for adaptive flutter suppression, in-flight simulation, and artificial intelligence are briefly discussed

PRISE: An Integrated Platform for Research and Teaching of Critical Embedded Systems

In this paper, we present PRISE, an integrated workbench for Research and Teaching of critical embedded systems at ISAE, the French Institute for Space and Aeronautics Engineering. PRISE is built around state-of-the-art technologies for the engineering of space and avionics systems used in Space and Avionics domain. It aims at demonstrating key aspects of critical, real-time, embedded systems used in the transport industry, but also validating new scientific contributions for the engineering of software functions. PRISE combines embedded and simulation platforms, and modeling tools. This platform is available for both research and teaching. Being built around widely used commercial and open source software; PRISE aims at being a reference platform for our teaching and research activities at ISAE

Skills development and recoding in engineering analysis and simulation : Industry needs

The EASIT2 project (Engineering Analysis and Simulation Innovation Transfer), funded under the European Union Lifelong Learning Programme, has the major goal to contribute to the competitiveness and quality of engineering, design and manufacturing in Europe through identifying the generic competencies that users of engineering analysis and simulation systems must possess. This competency framework will include a comprehensive Educational Base, a web-based interface compatible with other staff development systems, with links to associated resource material that engineers and analysts can use to develop and track their competencies. The project will also deliver an integrated Registered Analyst (RA) Scheme to provide recognition of achievement of these competencies. In order to help ensure that the deliverables of this project meet industry needs, a survey was undertaken and this paper summarises the findings of this survey. The survey comprised of an online questionnaire and was completed by 1094 respondents from 50 different countries. A large majority of respondents thought a system to define analyst skills and provide links to appropriate training resources would be useful. There was also strong support for a form of professional qualification in engineering analysis. The advantages to industry that these project deliverables would bring include incentives for staff development, marketing power and enhanced subcontractor qualification and internal resource management. The survey also provided a valuable insight into the current state of the engineering analysis and simulation industry. The most significant barriers to the effective use of engineering analysis were identified as recruitment of suitably qualified and experienced staff and a lack of analysis skills. “Pressure of work” was also identified as the most significant reason why organisations fail to get the most out of engineering analysis software. The findings of this survey are now being used in the development of the project deliverables to ensure that they meet the needs of industry as much as possible

A Geant4 based engineering tool for Fresnel lenses

Geant4 is a Monte Carlo radiation transport toolkit that is becoming a tool of generalized application in areas such as high-energy physics, nuclear physics, astroparticle physics, or medical physics. Geant4 provides an optical physics process category, allowing the simulation of the production and propagation of light. Its capabilities are well tailored for the simulation of optics systems namely in cosmic-rays experiments based in the detection of Cherenkov and fluorescence light. The use of Geant4 as an engineering tool for the optics design and simulation of Fresnel lens systems is discussed through a specific example.Comment: 4 pages, 6 figures, Proceedings of the 30th ICRC, International Cosmic Ray Conference 2007, M\'erida, M\'exico, 3-11 July 200