Improving risk matrices: the advantages of logarithmically scaled axes

Levine, E. S.

doi:10.1080/13669877.2011.634514

Cited by 78 publications

(82 citation statements)

References 6 publications

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“…Indeed, the oft observed coloring along diagonal bands, as demonstrated in Figure 3 and Figure 4, is in better agreement with the additive than with the multiplicative scores: the additive scores present equal risk along the diagonals from the upper left to the lower right cells of the matrix (see figure 4). Levine (2012) uses this as an argument to advocate logarithmic scaling.…”

Section: Risk Scores and Scalingmentioning

confidence: 99%

“…It should be noted that in earlier publications, notably Cox (2008), and Levine (2012), risk is separately defined as Risk=probability × consequence or a similar function. The essence of Cox' analysis is that the risk matrix should show "logical compatibility with quantitative risks".…”

Section: Defining Risk In the Framework Of The Risk Matrixmentioning

confidence: 99%

“…• Consistency between the risk matrix and quantitative measures, and, as a consequence, the appropriateness of decisions based on risk matrices (Cox, 2008, Levine, 2012, Flage and Røed, 2012); • The subjective classification of consequence and probability (Cox, 2008, Smith, Siefert et al, 2009, ISO, 2010, Hubbard and Evans, 2010); • The definition of risk scores and its relation to the scaling of the categories (linear or logarithmic) (Levine, 2012, Ni, Chen et al, 2010, Ruge, 2004, Franks andMaddison, 2006, Hubbard andEvans, 2010); • The limited resolution of risk matrices -resulting in "risk ties" (Cox, 2008, Ni, Chen et al, 2010);…”

Section: Review Of Earlier Comments On Risk Matricesmentioning

confidence: 99%

“…Only recently have some publications addressed this problem. The first openly critical review was published by Cox (2008) followed by Levine (2012) and Flage and Røed (2012). The mentioned appendix B29 of ISO 31010 (2010) also includes an invaluable summary of the advantages and disadvantages of risk matrices, together with recommendations for their usage.…”

Section: Introductionmentioning

confidence: 99%

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Recommendations on the use and design of risk matrices

2015

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Risk matrices are widely used in risk management. They are a regular feature in various risk management standards and guidelines and are also used as formal corporate risk acceptance criteria. It is only recently, however, that scientific publications have appeared that discuss the weaknesses of the risk matrix. The objective of this paper is to explore these weaknesses, and provide recommendations for the use and design of risk matrices. The paper reviews the few relevant publications and adds some observations of its own in order to emphasize existing recommendations and add some suggestions. The recommendations cover a range of issues, among them: the relation between coloring the risk matrix and the definition of risk and major hazard aversion; the qualitative, subjective assessment of likelihood and consequence; the scaling of the discrete likelihood and consequence categories; and the use of corporate risk matrix standards. Finally, it proposes a probability consequence diagram with continuous scales; providing, in some instances, an alternative to the risk matrix.

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Section: Risk Scores and Scalingmentioning

confidence: 99%

Section: Defining Risk In the Framework Of The Risk Matrixmentioning

confidence: 99%

Section: Review Of Earlier Comments On Risk Matricesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recommendations on the use and design of risk matrices

2015

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“…This analysis provides an alternative to the use of risk matrices, which are often used by homeland security operators when conducting a risk assessment under the above constraints. Risk matrices have many methodological weaknesses and are poor tools for informing risk management and other resource allocation decisions, though there are some exceptions …”

Section: Discussion Lessons Learned and Conclusionmentioning

confidence: 99%

Managing Risk at the Tucson Sector of the U.S. Border Patrol

Levine

Waters

2012

Risk Analysis

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This article describes a risk analysis used to inform resource allocation at the Tucson Sector of the U.S. Border Patrol, the busiest sector for alien and drug trafficking along the Southwest land border with Mexico. The model and methodology that underlie this analysis are generally applicable to many resource allocation decisions regarding the management of frequently occurring hazards, decisions regularly made by officials at all levels of the homeland security enterprise. The analysis was executed by agents without previous risk expertise working under a short time frame, and the findings from the analysis were used to inform several resource allocation decisions.

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Risk Management

Glendon¹

2015

The Wiley Blackwell Handbook of the Psychology of Occupational Safety and Workplace Health

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Improving risk matrices: the advantages of logarithmically scaled axes

Cited by 78 publications

References 6 publications

Recommendations on the use and design of risk matrices

Recommendations on the use and design of risk matrices

Managing Risk at the Tucson Sector of the U.S. Border Patrol

Risk Management

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