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WILEY SERIES IN STATISTICS IN PRACTICE
Advisory Editor, Marian Scott, University of Glasgow, Scotland, UK
Founding Editor, Vic Barnett, Nottingham Trent University, UK
Statistics in Practice is an important international series of texts which provide detailed coverage of statistical concepts, methods, and worked case studies in specific fields of investigation and study.
With sound motivation and many worked practical examples, the books show in down‐to‐earth terms how to select and use an appropriate range of statistical techniques in a particular practical field within each title's special topic area.
The books provide statistical support for professionals and research workers across a range of employment fields and research environments. Subject areas covered include medicine and pharmaceutics; industry, finance, and commerce; public services; the earth and environmental sciences; and so on.
The books also provide support to students studying statistical courses applied to the aforementioned areas. The demand for graduates to be equipped for the work environment has led to such courses becoming increasingly prevalent at universities and colleges.
It is our aim to present judiciously chosen and well‐written workbooks to meet everyday practical needs. Feedback of views from readers will be most valuable to monitor the success of this aim.
A complete list of titles in this series appears at the end of the volume.
Risk Assessment
Theory, Methods, and Applications
Second Edition
Marvin Rausand
Stein Haugen

This edition first published 2020
© 2020 John Wiley & Sons, Inc.
Edition History
John Wiley & Sons, Inc. (1e, 2011)
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Library of Congress Cataloging‐in‐Publication Data
Names: Rausand, Marvin, author. | Haugen, Stein, author.
Title: Risk assessment : theory, methods, and applications / Marvin
Rausand, Stein Haugen.
Description: Second edition. | Hoboken, NJ : John Wiley & Sons, 2020. |
Series: Wiley series in statistics in practice | Includes
bibliographical references and index.
Identifiers: LCCN 2019041379 (print) | LCCN 2019041380 (ebook) | ISBN
9781119377238 (hardback) | ISBN 9781119377283 (adobe pdf) | ISBN
9781119377221 (epub)
Subjects: LCSH: Technology–Risk assessment. | Risk assessment.
Classification: LCC T174.5 .R37 2020 (print) | LCC T174.5 (ebook) | DDC
363.1/02–dc22
LC record available at https://lccn.loc.gov/2019041379
LC ebook record available at https://lccn.loc.gov/2019041380
Cover Design: Wiley
Cover Image: © Soloviova Liudmyla/Shutterstock
To Hella, Guro and Idunn, Emil and Tiril
To Jorunn, Trine, Ingrid, Kristian and Brage, Nora and Alma
This book gives a comprehensive introduction to risk analysis and risk assessment, with focus on the theory and the main methods for such analyses. The objects studied are technical or sociotechnical systems, and we delimit our attention to potential, sudden, and major accidents. Day‐to‐day safety problems and negative health effects due to long‐term exposure are outside the scope of the book. Topics, such as financial risk are also outside the scope. More detailed objectives and delimitations of the book are supplied at the end of Chapter 1.
What is Changed From the First Edition?
This second edition is a major update of the first edition (Rausand 2011). Almost all sections have been reorganized and rewritten. The most significant changes include:
Chapters 1 and 2 are totally rewritten and many definitions have been rephrased.
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