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An Investigation of the Accuracy of Heuristic Methods for Cost Uncertainty Analysis

An Investigation of the Accuracy of Heuristic Methods for Cost Uncertainty Analysis
Author: Wendell Phillips Simpson
Publisher:
Total Pages: 32
Release: 1994
Genre: Economics
ISBN:

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Cost uncertainty analysis has received a great deal of attention over the last several years. The purpose of a cost uncertainty analysis is to identify the cost and schedule implications associated with program uncertainties. Common methods for uncertainty analysis characterize the possible cost and schedule outcomes of a project using a probability density function (pdf). Heuristic methods have been proposed for uncertainty analysis that assume the shape of the total cost pdf is either normally or lognormally distributed. While experienced analysts feel these distributions provide reasonable approximations, little evidence exists to either confirm or refute these presumptions. An experiment is conducted in which number of cost elements, the degree of skewness of the cost elements, and the degree of correlation between cost elements are varied systematically. The resulting total cost pdfs are compared to the heuristic distributions using goodness of fit tests. The results show that the normal distribution provides an excellent approximation for the simulated distributions. Guidelines are offered that help the cost analyst determine whether these heuristics ought to be applied in a cost uncertainty analysis. Cost analysis, Cost uncertainty analysis.


Probability Methods for Cost Uncertainty Analysis

Probability Methods for Cost Uncertainty Analysis
Author: Paul R Garvey
Publisher: Chapman and Hall/CRC
Total Pages: 0
Release: 2015-09-21
Genre: Mathematics
ISBN: 9781482219753

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Since the 1950s, a substantial body of scholarship on cost uncertainty analysis has evolved. Published material appears in numerous industry and government technical reports, symposia proceedings, and professional journals. Despite this, there is a need in the systems engineering community to synthesize prior scholarship and relate it to advances in technique and problem sophistication. Created to address this need, this book is designed as a reference for mathematically-literate systems engineers, engineering managers, cost engineers, systems cost and economic analysts, management scientists, and operations research analysts.


Principles of Risk Analysis

Principles of Risk Analysis
Author: Charles Yoe
Publisher: CRC Press
Total Pages: 873
Release: 2019-01-30
Genre: Technology & Engineering
ISBN: 0429664893

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In every decision problem there are things we know and things we do not know. Risk analysis science uses the best available evidence to assess what we know while it is carefully intentional in the way it addresses the importance of the things we do not know in the evaluation of decision choices and decision outcomes. The field of risk analysis science continues to expand and grow and the second edition of Principles of Risk Analysis: Decision Making Under Uncertainty responds to this evolution with several significant changes. The language has been updated and expanded throughout the text and the book features several new areas of expansion including five new chapters. The book’s simple and straightforward style—based on the author’s decades of experience as a risk analyst, trainer, and educator—strips away the mysterious aura that often accompanies risk analysis. Features: Details the tasks of risk management, risk assessment, and risk communication in a straightforward, conceptual manner Provides sufficient detail to empower professionals in any discipline to become risk practitioners Expands the risk management emphasis with a new chapter to serve private industry and a growing public sector interest in the growing practice of enterprise risk management Describes dozens of quantitative and qualitative risk assessment tools in a new chapter Practical guidance and ideas for using risk science to improve decisions and their outcomes is found in a new chapter on decision making under uncertainty Practical methods for helping risk professionals to tell their risk story are the focus of a new chapter Features an expanded set of examples of the risk process that demonstrate the growing applications of risk analysis As before, this book continues to appeal to professionals who want to learn and apply risk science in their own professions as well as students preparing for professional careers. This book remains a discipline free guide to the principles of risk analysis that is accessible to all interested practitioners. Files used in the creation of this book and additional exercises as well as a free student version of Palisade Corporation’s Decision Tools Suite software are available with the purchase of this book. A less detailed introduction to the risk analysis science tasks of risk management, risk assessment, and risk communication is found in Primer of Risk Analysis: Decision Making Under Uncertainty, Second Edition, ISBN: 978-1-138-31228-9.


Data-Driven Modelling with Fuzzy Sets

Data-Driven Modelling with Fuzzy Sets
Author: Said Broumi
Publisher: CRC Press
Total Pages: 348
Release: 2024-07-17
Genre: Computers
ISBN: 1040043062

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Zadeh introduced in 1965 the theory of fuzzy sets, in which truth values are modelled by numbers in the unit interval [0, 1], for tackling mathematically the frequently appearing in everyday life partial truths. In a second stage, when membership functions were reinterpreted as possibility distributions, fuzzy sets were extensively used to embrace uncertainty modelling. Uncertainty is defined as the shortage of precise knowledge or complete information and possibility theory is devoted to the handling of incomplete information. Zadeh articulated the relationship between possibility and probability, noticing that what is probable must preliminarily be possible. Following the Zadeh’s fuzzy set, various generalizations (intuitionistic, neutrosophic, rough, soft sets, etc.) have been introduced enabling a more effective management of all types of the existing in real world uncertainty. This book presents recent theoretical advances and applications of fuzzy sets and their extensions to Science, Humanities and Education. This book: Presents a qualitative assessment of big data in the education sector using linguistic Quadri partitioned single valued neutrosophic soft sets. Showcases application of n-cylindrical fuzzy neutrosophic sets in education using neutrosophic affinity degree and neutrosophic similarity Index. Covers scientific evaluation of student academic performance using single value neutrosophic Markov chain. Illustrates multi-granulation single-valued neutrosophic probabilistic rough sets for teamwork assessment. Examines estimation of distribution algorithm based on multiple attribute group decision-making to evaluate teaching quality. It is primarily written for Senior undergraduate and graduate students and academic researchers in the fields of electrical engineering, electronics and communication engineering, computer science and engineering.


Handbook of Military and Defense Operations Research

Handbook of Military and Defense Operations Research
Author: Natalie M. Scala
Publisher: CRC Press
Total Pages: 481
Release: 2020-02-10
Genre: Business & Economics
ISBN: 042988396X

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Operations research (OR) is a core discipline in military and defense management. Coming to the forefront initially during World War II, OR provided critical contributions to logistics, supply chains, and strategic simulation, while enabling superior decision-making for Allied forces. OR has grown to include analytics and many applications, including artificial intelligence, cybersecurity, and big data, and is the cornerstone of management science in manufacturing, marketing, telecommunications, and many other fields. The Handbook of Military and Defense Operations Research presents the voices leading OR and analytics to new heights in security through research, practical applications, case studies, and lessons learned in the field. Features Applies the experiences of educators and practitioners working in the field Employs the latest technology developments in case studies and applications Identifies best practices unique to the military, security, and national defense problem space Highlights similarities and dichotomies between analyses and trends that are unique to military, security, and defense problems.


Reliability and Safety Engineering

Reliability and Safety Engineering
Author: Ajit Kumar Verma
Publisher: Springer
Total Pages: 583
Release: 2015-09-28
Genre: Technology & Engineering
ISBN: 1447162692

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Reliability and safety are core issues that must be addressed throughout the life cycle of engineering systems. Reliability and Safety Engineering presents an overview of the basic concepts, together with simple and practical illustrations. The authors present reliability terminology in various engineering fields, viz., electronics engineering, software engineering, mechanical engineering, structural engineering and power systems engineering. The book describes the latest applications in the area of probabilistic safety assessment, such as technical specification optimization, risk monitoring and risk informed in-service inspection. Reliability and safety studies must, inevitably, deal with uncertainty, so the book includes uncertainty propagation methods: Monte Carlo simulation, fuzzy arithmetic, Dempster-Shafer theory and probability bounds. Reliability and Safety Engineering also highlights advances in system reliability and safety assessment including dynamic system modeling and uncertainty management. Case studies from typical nuclear power plants as well as from structural, software and electronic systems are also discussed. Reliability and Safety Engineering combines discussions of the existing literature on basic concepts and applications with state-of-the-art methods used in reliability and risk assessment of engineering systems. It is designed to assist practicing engineers, students and researchers in the areas of reliability engineering and risk analysis.


Primer on Risk Analysis

Primer on Risk Analysis
Author: Charles Yoe
Publisher: CRC Press
Total Pages: 294
Release: 2019-01-18
Genre: Technology & Engineering
ISBN: 0429664877

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Primer on Risk Analysis: Decision Making Under Uncertainty, Second Edition lays out the tasks of risk analysis in a straightforward, conceptual manner, tackling the question, "What is risk analysis?" Distilling the common principles of many risk dialects into serviceable definitions, it provides a foundation for the practice of risk management and decision making under uncertainty for professionals from all disciplines. New in this edition is an expanded risk management emphasis that includes an overview chapter on enterprise risk management and a chapter on decision making under uncertainty designed to help decision makers use the results of risk analysis in practical ways to improve decisions and their outcomes. This book will empower you to enter the world of risk management in your own domain of expertise by providing you with practical, insightful, useful and adaptable knowledge of risk analysis science including risk management, risk assessment, and risk communication. Features: Answers the fundamental question, "What is Risk Analysis?" Presents the tasks of risk management, risk assessment, and risk communication in a straightforward, conceptual manner Responds to the continuing evolution of risk science and addresses the language of risk as it continues to evolve Expands the risk management emphasis with a new chapter to serve private industry and a growing public sector interest in the growing practice of enterprise risk management Includes a new chapter on decision making under uncertainty provides practical guidance and ideas for using risk science to improve decisions and their outcomes Features an expanded set of examples of the risk process that demonstrate the growing applications of risk analysis This book is suitable for executives, professionals and students who seek a fundamental understanding of risk management, risk assessment, and risk communication. A more detailed examination of this topic, suitable for practitioners from any discipline as well as students and professionals who aspire to become experts in the practice of risk analysis science, is found in Principles of Risk Analysis: Decision Making Under Uncertainty, Second Edition, ISBN: 978-1-138-47820-6.