Risk assessment matrices examples

Fratricide Risk Assessment Matrix Example of Unit Defense Perimeter TACSOP... 

The importance of any engineering subject is calculated by two factors risk and cost. While risky is an unscientific way of addressing an issue that is potentially dangerous, risk has a clear engineering definition risk is the product of likelihood and consequences. These factors are expressed in a risk assessment matrix Figure 1.2 shows an example of a risk matrix. 

FIGURE 1.2 Example of a color-coded risk assessment matrix. Different classes of risks are not given. 

Table 14.6 is a Hazard/Risk Assessment Matrix that also includes suggested action levels. It is an adaptation of one of two examples... 

Earlier in this chapter, reference was made to a speaker who reviewed the hazard analysis and risk assessment methods used in his company, which relied on typical risk assessment and decision-making matrices, to achieve acceptable risk levels. Use of such matrices is a method some organizations apply to arrive at acceptable risk levels. Table 15.1 is an example of such a risk assessment matrix. Using the results from Table 15.1, levels of remedial action or risk acceptance for individual risk categories can be established, as in Table 15.2. 

Figure 36-1. Example of a risk assessment matrix that is part of a system safety method.

To emphasize Safety professionals must understand that the definitions of terms for incident probability and severity and for risk levels vary greatly. Thus, they should tailor a risk assessment matrix to suit the hazards and risks and the management tolerance for risk with which they deal. Examples of the definitions used for incident probability and severity are presented here, as well as definitions for risk categories and risk assessment matrices. They are intended to provide safety professionals with a broad base of information from which choices can be made in developing the matrix considered appropriate for their clients needs. 

This author provided input on Annex E to the two people who drafted it Jim Howe, vice chairman of the ZIO Accredited Standards Committee, representing the United Auto Workers International Union and Kendall Crawford, who operates Kendall C. Crawford Associates and represented the American Petroleum Institute as a ZIO committee member. Howe and Crawford made revisions in what I provided so that its definitions and language were compatible with those of the standard itself. Crandall combined the separate risk assessment matrix and management decision levels I sent him into one matrix. Although the exhibit in Table 11 is close to the example given in Annex E, it is not an exact duplicate. 

In the discussion that follows of acceptable and tolerable risk levels and the management actions to be taken to achieve them, the Example of a Risk Assessment Matrix given in Table 11 serves as the foundation. Keep in mind that ... 

Note that the EMEA process described here requires the entry of probability, severity, and risk codes. The example of a risk assessment matrix shown in Table 13, and the Risk Category Codes, given in the nearby text fulfill the needs for traditional FMEA purposes. A Eailure Modes and Effects Analysis form on which those codes would be entered is provided in Addendum C at the end of this chapter, courtesy of A-P-T Research, Inc. 

B155.1 s Subsection 6.4, Assess Initial Risk, says that risks shall be assessed using a risk scoring system. The Example Risk-Scoring System shown in the standard is taken from MIL-STD-882D. It is identical to the Risk Assessment Matrix depicted in Table 7 in Chapter 8, A Primer on Hazard Analysis and Risk Assessment, and shown here as Table 4. 

TABLE 2.3 Example of a Hazard Risk Assessment Matrix—Values Can Be Assigned Based Upon Oi anization Preferences... 

A risk assessment matrix for use in determining acceptable risk levels is offered as an example. 

Since resources are always limited, spending an inordinate amount of money to reduce the risk only a little through costly engineering and redesign is inappropriate, particularly if that money could be better spent otherwise. That premise can be demonstrated through an example that uses a risk assessment matrix as a part of the decision making. 

All personnel involved in the risk assessment processes must understand the definitions used for occurrence probability and severity and for risk levels in the risk assessment matrix chosen. An example of a risk assessment matrix is shown in Chapter 6 under Acceptable Risk. It includes examples of ... 

Figure 8.4 Example Risk Assessment Matrix. Based on and adapted for demonstration purposes Department of Defense Standard Practice (2012).

Table 11.4 Example of a risk analysis matrix for assessment of a computer system.

Each process owner requires a defined level of decision authority. This authority level delineates the bounds of decision making granted by the organization to the process owner. Business needs and risk assessment must be incorporated into the design of the decision authority granted to a process owner. Table 6 is an example of a decision authority matrix design for a process owner. It requires cross-functional management support to be effective. 

Answers to these questions provide preliminary insight into the variables for which extrapolation can be considered most urgent, due to an estimated numerical influence on the assessment results. For example, matrix and media extrapolation might be identified as the most important modifying factor, and the risk assessment might fully focus on this factor in the lowest tier. Information on issues for which no extrapolation will be applied need to be kept in the dossier, for reporting which factors have been considered and what numerical influence (magnitude and direction) is expected. 

For pesticide risk assessment, 3 major types of population models can be distinguished (Bartell et al. 2003) difference or differential equations, matrix models, and individual- or agent-based models. Within each type, further distinctions can be made, for example, regarding the inclusion of stochasticity or spatial effects. However, these distinctions are less fundamental than the choice of the model type itself. 

Matrix models are sets of mostly linear difference equations. Each equation describes the dynamics of 1 class of individuals. Matrix models are based on the fundamental observation that demographic rates, that is, fecundity and mortality, are not constant throughout an organism s life cycle but depend on age, developmental stage, or size. Ecological interactions, natural disturbances, or pesticide applications usually will affect different classes of individuals in a different way, which can have important implications for population dynamics and risk. In the following, I will only consider age-structured models, but the rationale of the other types of matrix models is the same. For an example of this approach applied to pesticide risk assessment, see Stark (Chapter 5). 

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