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Evaluating the impact of test-first programming and pair programming through software process simulation

software process: Improvement and Practice 2006年第4期11卷

作者： Marco Melis Ivana Turnu Alessandra Cau Giulio Concas Department of Electrical and Electronic Engineering Università di Cagliari piazza d'armi 09123 Cagliari Italy

In this article, we present a simulation model that we developed for exploring the influence of two key Extreme Programming (XP) practices — Test-first Programming and Pair Programming — on the evolution of an XP software project. We present the results obtained simulating a typical XP project changing the usage levels of the two practices. We focused on output variables related to effort, size, quality and released functionalities. Copyright © 2006 John Wiley & Sons, Ltd.

关键词： extreme programming software process simulation process model test driven development test-first pair programming

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Heuristic optimization as a V&V tool for software process simulation models

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software process: Improvement and Practice 2005年第3期10卷

作者： Wayne Wakeland Stephen Shervais David Raffo Portland State University P.O. Box 751 Portland OR 97207 USA Eastern Washington University 316 Kingston Cheney WA 99004 USA

This work illustrates the use of heuristic algorithms to improve the verification and validation of software process simulation models. To use this approach, an optimization problem is formulated to guide a heuristic search algorithm that will attempt to locate particular combinations of parameter values that yield surprising results. These surprising results often help the modeler to identify flaws in the model logic that would otherwise remain undetected. The general concepts are discussed and a simple example is provided. Copyright © 2005 John Wiley & Sons, Ltd.

关键词： software process simulation verification validation heuristic algorithm

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RVSim: A simulation approach to predict the impact of requirements volatility on software project plans

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International Conference on software process

作者： Liu, Dapeng Wang, Qing Xiao, Junchao Li, Juan Li, Huaizhang Chinese Acad Sci Inst Software Lab Internet Software Technol Beijing 100190 Peoples R China

ISBN: (纸本)9783540795872

Requirements volatility is a common project risk which has severe consequences on software projects. Though its impact on various aspects of software projects has been highlighted extensively, its influence on project plans is not well explored yet. This paper proposes a simulation approach RVSim (Requirements Volatility simulation) which utilizes requirements traceability and dependency information to predict,the impact of requirements volatility on software project plans. RVSim can help analyze the effects of requirements volatility in depth, and provide useful information for users to make better decisions. Moreover, RVSim supports customization for users' own software processes and projects. We also provide a case study to illustrate the applicability and effectiveness of RVSim.

关键词： requirements volatility requirements traceability requirements dependency software process simulation risk management

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Exploring the impact of employee turnover on the effectiveness of software development team archetypes 07

Exploring the impact of employee turnover on the effectivene...

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Proceedings of the 2007 spring simulation multiconference - Volume 2

作者： Levent Yilmaz Auburn University Auburn AL

ISBN: (纸本)9781565553132

This paper presents an agent-based simulation study that explores the effects of team behavior on the efficiency and effectiveness of software development organizations that pursue incremental and iterative processes. The conceptual model underlying the simulation framework is based on the fundamental tenets of organization theory. The organization-theoretic perspective to simulation modeling of software processes entails characterizing the components of organizational design, as well as types of team cooperation mechanisms that are associated with selected team archetypes. We present the simulation framework Team-RUP and use it to examine the extent of the impact of turbulence (i.e., employee turnover) on the effectiveness of software development under various team archetypes. We observe that asynchronous team cooperation models are less predictable than synchronous models. Also, teams that utilize bottom-up coordination strategies are more adept at responding to change.

关键词： team behavior agent-based simulation rational unified process software process simulation

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A System Dynamics simulation Model for Analyzing the Stability of software Release Plans

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software process: Improvement and Practice 2007年第5期12卷

作者： Dr Dietmar Pfahl Ahmed Al-Emran Günther Ruhe University of Calgary Schulich School of Engineering Calgary Canada University of Calgary Schulich School of Engineering Software Engineering Decision Support Laboratory Calgary Canada

Release planning for incremental software development assigns features to releases such that most important technical, resource, risk and budget constraints are met. The research presented in this paper is an element of a three-staged procedure. In addition to an existing method for (i) strategic release planning that maps requirements to subsequent releases and (ii) a more fine-grained planning that defines resource allocations for each individual release, we propose a third step, i.e. (iii) stability analysis, which analyzes fine-grained plans of individual releases with regard to their sensitivity to planning errors. Planning errors can relate to alterations in expected personnel availability and productivity, feature and task-specific work volume, and degree of task dependency. The focus of this article is on stability analysis of proposed release plans. We present the simulation model Release Plan Simulator, Version 1 (REPSIM-1) and illustrate its usefulness for stability analyses with the help of a case example. Copyright © 2007 John Wiley & Sons, Ltd.

关键词： software release planning software process simulation stability analysis system dynamics

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Modeling and simulation of open source development using an agile practice

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JOURNAL OF SYSTEMS ARCHITECTURE 2006年第11期52卷 610-618页

作者： Turnu, Ivana Melis, Marco Cau, Alessandra Setzu, Alessio Concas, Giulio Mannaro, Katiuscia Univ Cagliari Dept Elect & Elect Engn I-09123 Cagliari Italy

The goal of this work is to study the effects of the adoption of agile practices on open source development. In particular, we started to evaluate the effects of TDD (Test Driven Development) since it is easier to apply in a distributed environment than most other agile practices. In order to reach this goal we used the simulation modeling approach. We developed a simulation model of open source software development process. The model was tuned using data from a real FLOSS project: Apache HTTP Server. To introduce the TDD practice in our FLOSS simulation model, we made some assumptions based on empirical results. The two FLOSS development models (nonTDD and TDD) were compared. The one incorporating the agile practice yields better results in terms of code quality. (C) 2006 Elsevier B.V. All rights reserved.

关键词： software process simulation open source extreme programming test driven development

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Virtual software engineering laboratories in support of trade-off analyses

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software QUALITY JOURNAL 2005年第4期13卷 407-428页

作者： Münch, J Pfahl, D Rus, I Fraunhofer Inst Expt Software Engn IESE D-67663 Kaiserslautern Germany Univ Calgary Schulich Sch Engn Calgary AB T2N 1N4 Canada Fraunhofer Ctr Maryland College Pk MD USA

Due to demanding customer needs and evolving technology, software organizations are forced to trade individual functional and non-functional product quality profiles against other factors such as cost, time, or productivity. The ability to influence or even control these factors requires a deep understanding of the complex relations between process and product attributes in relevant contexts. Based on such understanding, decision support is needed to adjust processes so that they match the product quality goals without violating given project constraints. We propose to use a Virtual software Engineering Laboratory (VSEL) to establish such decision support cost-effectively. VSELs can be considered as being complementary to existing (empirical) software Engineering Laboratories. This paper gives an introduction into the cornerstones of VSELs, discusses how they complement traditional empirically based software Engineering Laboratories (SELs), and illustrates with the help of case examples from industrial and research environments, how to use them in support of product-focused trade-off analyses.

关键词： decision support software engineering laboratories software process modeling software process simulation trade-off-analyses

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An interactive software management simulator based on the CMMI framework

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software process: Improvement and Practice 2005年第3期10卷

作者： Thomas Birkhölzer Christoph Dickmann Jürgen Vaupel Laura Dantas University of Applied Science Konstanz Germany Siemens Medical Solutions Erlangen Germany Valeo Lighting Systems Martos Spain

A software-producing organization is a complex system. An interactive simulation that allows playful exploration and experimenting can enhance the understanding of such complex systems. Therefore, a simulator concept is presented that lets its user act in the role of a software-producing organization's top-level manager. In this role, business measures must be monitored and investment decisions need to be made. The model is developed as a feasibility investigation with the premise of maximal abstraction, using concepts of the Capability Maturity Model Integration (CMMI) and balanced scorecards: 15 process areas deduced from CMMI serve as states and investment fields and 27 business performance indicators form the outputs. simulations of different scenarios illustrate that the model is capable of reflecting underlying strategies for advancing or maintaining an organization's processes. Moreover, the iterative and interactive investment approach and the graphical and historical result presentation can give valuable insight into complex process dependencies. Therefore, the simulator can serve as a tool to playfully enhance the appreciation of software engineering practices. It can be used by all stakeholders involved in software development to better understand the various aspects of software engineering, their interdependencies, and the resulting complex dynamics of the software-producing organization's operations. Copyright © 2005 John Wiley & Sons, Ltd.

关键词： software process simulation capability maturity model CMMI balanced scorecards interactive simulation software management training

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Common structures in system dynamics models of software acquisition projects

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software process: Improvement and Practice 2004年第2期9卷

作者： Tobias Häberlein Universität Ulm Department of Software Methodology 89075 Ulm Germany

In consequence of Abdel-Hamid and Madnick's pioneer work on system dynamics modeling of software development processes, there is a great number of recent publications dealing with the simulation of the software development process (or sub-processes of it) with system dynamics. Projects that contract third parties to develop the software are even more unpredictable and underestimated by management than pure development projects, and, thus, there is also a need to model and simulate these projects. This article deals with the design of system dynamics models of the unexplored domain—at least with respect to system dynamics—of software acquisition; a framework is described, which captures causal structures common to all models of acquisition projects. Outputs of one concrete instance of the framework are presented finally. Copyright © 2004 John Wiley & Sons, Ltd.

关键词： system dynamics software acquisition software process simulation

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Stochastic simulation of risk factor potential effects for software development risk management

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JOURNAL OF SYSTEMS AND software 2001年第3期59卷 247-257页

作者： Houston, DX Mackulak, GT Collofello, JS Honeywell Inc Phoenix AZ 85021 USA Arizona State Univ Dept Ind Engn Tempe AZ 85287 USA Arizona State Univ Dept Comp Sci & Engn Tempe AZ 85287 USA

One of the proposed purposes for software process simulation is the management of software development risks, usually discussed within the category of project planning/management. However, modeling and simulation primarily for the purpose of software development risk management has been quite limited. This paper describes an approach to modeling risk factors and simulating their effects as a means of supporting certain software development risk management activities. The effects of six common and significant software development risk factors were studied. A base model was then produced for stochastically simulating the effects of the selected factors. This simulator is a tool designed specifically for the risk management activities of assessment, mitigation, contingency planning, and intervention. (C) 2001 Elsevier Science Inc. All rights reserved.

关键词： software development risk risk factors software risk management stochastic simulation software process simulation

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