Management of Uncertainty: Theory and Application in the Design of Systems and Organizations (Decision Engineering)

Management of Uncertainty: Theory and Application in the Design of Systems and Organizations (Decision Engineering) Review

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Management of Uncertainty: Theory and Application in the Design of Systems and Organizations (Decision Engineering) Feature

The handling of uncertainties stemming from internal processes and the environment is a core issue in organizational and system design. Management of Uncertainty examines the necessity of living with technical and organizational uncertainties, or even taking advantage of them without losing the stability created by reducing uncertainty.

Building on concepts from organization theory, control theory, decision theory, and work and organizational psychology, a decision process is proposed that supports systematic evaluation of the costs and benefits of reducing, maintaining, or increasing uncertainty in a particular context.

Management of Uncertainty will be a useful tool for postgraduate researchers, as well as for operational and strategic decision-makers in organizations. It offers a number of concrete instruments for organizational and system design, which are further illustrated by a range of case studies.

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Testing .NET Application Blocks

Testing .NET Application Blocks Review

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Testing .NET Application Blocks Feature

Complex software environments require more in-depth testing. This book delivers the detailed guidance you need to plan and execute testing for the solutions you develop with Microsoft PATTERNS & PRACTICES application blocks. Whether you’re customizing the application blocks or integrating them into existing applications, you’ll understand the key considerations for verifying that your code meets its requirements for performance, availability, scalability, compatibility, globalization, and security features. You’ll find code examples, sample test cases, and checklists that demonstrate how to plan and implement each type of test; the guide also recommends tools to use to run the tests.

While this book was designed specifically for use in testing Microsoft PATTERNS & PRACTICES application blocks, it also provides an excellent resource for testing other .NET code.

All PATTERNS & PRACTICES guides are reviewed and approved by Microsoft engineering teams, consultants, partners, and customers—delivering accurate, real-world information that’s been technically validated and tested.

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Application and Program Performance Analysis Using PEX Statistics on IBM I5/Os

Application and Program Performance Analysis Using PEX Statistics on IBM I5/Os Review

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Application and Program Performance Analysis Using PEX Statistics on IBM I5/Os Feature

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A comparison between the uncertainties in model parameters and in forcing functions: its application to a 3D water-quality model [An article from: Environmental Modelling and Software]

A comparison between the uncertainties in model parameters and in forcing functions: its application to a 3D water-quality model [An article from: Environmental Modelling and Software] Review

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A comparison between the uncertainties in model parameters and in forcing functions: its application to a 3D water-quality model [An article from: Environmental Modelling and Software] Feature

This digital document is a journal article from Environmental Modelling and Software, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
This paper illustrates the application of both local and global sensitivity analysis techniques to an estimation of the uncertainty in the output of a 3D reaction-diffusion ecological model; the model describes the seasonal dynamics of dissolved Nitrogen and Phosphorous, and those of the phytoplanktonic and zooplanktonic communities in the lagoon of Venice. Two sources of uncertainty were taken into account and compared: (1) uncertainty concerning the parameters of the governing equation; (2) uncertainty concerning the forcing functions. The mean annual concentrations of Dissolved Inorganic Nitrogen (DIN) was regarded as the model output, as it represents the largest fraction of the Total Dissolved Nitrogen, TDN, for which the current Italian legislation sets a quality target in the lagoon of Venice. A local sensitivity analysis was initially used, so as to rank the parameters and provide an initial estimation of the uncertainty, which is a result of an imperfect knowledge of the dynamic of the system. This uncertainty was compared with that induced by an imperfect knowledge of the loads of Nitrogen, which represent the main forcing functions. On the basis of the results of the local analysis, the most important parameters and loads were then taken as the sources of uncertainty, in an attempt to assess their relative contributions. The global uncertainty and sensitivity analyses were carried out by means of a sampling-based Monte Carlo method. The results of the subsequent input-output regression analysis suggest that the variance in the model output could be partitioned among the sources of uncertainty, in accordance with a linear model. Based on this model, 79% of the variance in the mean annual concentration of DIN was accounted for by the uncertainty in the parameters which specify the dynamics of the phytoplankton and zooplankton, and only 5% by the uncertainties in the three main Nitrogen sources.

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Joint Application Design: How to Design Quality Systems in 40% Less Time

Joint Application Design: How to Design Quality Systems in 40% Less Time Review

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Joint Application Design: How to Design Quality Systems in 40% Less Time Feature

Most system designers are up against a data processing nightmare: the real world of backlogs, cost constraints, and dissatisfied users. To banish these problems (and avoid endless meetings during the process) this book offers clear, practical guidelines for getting users and MIS professionals together before problems occur. JAD is a software design methodology developed by IBM to enhance application design productivity and quality. The authors offer extensive examples of CASE (Computer Assisted Software Engineering) techniques, and provide readers with complete checklists, workplans, and helpful sample agendas. Also included are documentation forms that readers can quickly apply to their own projects. The text will benefit project managers, application designers, mis software engineers, programmers and students.

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The Art of Application Performance Testing: Help for Programmers and Quality Assurance

The Art of Application Performance Testing: Help for Programmers and Quality Assurance Review

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The Art of Application Performance Testing: Help for Programmers and Quality Assurance Feature

This practical book provides a step-by-step approach to testing mission-critical applications for scalability and performance before they're deployed -- a vital topic to which other books devote one chapter, if that.

Businesses today live and die by network applications and web services. Because of the increasing complexity of these programs, and the pressure to deploy them quickly, many professionals don't take the time to ensure that they'll perform well and scale effectively. The Art of Application Performance Testing explains the complete life cycle of the testing process, and demonstrates best practices to help you plan, gain approval for, coordinate, and conduct performance tests on your applications. With this book, you'll learn to:

• Set realistic performance testing goals
• Implement an effective application performance testing strategy
• Interpret performance test results
• Cope with different application technologies and architectures
• Use automated performance testing tools
• Test traditional local applications, web-based applications, and web services (SOAs)
• Recognize and resolves issues that are often overlooked in performance tests

Written by a consultant with 30 years of experience in the IT industry and over 12 years experience with performance testing, this easy-to-read book is illustrated with real-world examples and packed with practical advice. The Art of Application Performance Testing thoroughly explains the pitfalls of an inadequate testing strategy and offers you a robust, structured approach for ensuring that your applications perform well and scale effectively when the need arises.

"Ian has maintained a vendor-agnostic methodology beautifully in this material. The metrics and graphs, along with background information provided in his case studies, eloquently convey to the reader, 'Methodology above all, tools at your discretion...' Ian's expertise shines through throughout the entire reading experience." -- Matt St. Onge, Enterprise Solution Architect, HCL Technologies America / Teradyne

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