Risk assessment matrices

Safety Pharmacology Integrated Risk Assessment Matrix... 

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. 

The reason this rather small-scale accident is mentioned next to the two large-scale accidents noted above is that this minor case presents a potential risk. Recalling the risk assessment matrix (Figure 4.2), it is not hard to imagine that such a small-scale accident could have had very serious consequences, ranking it as a potentially extremely hazardous case. In this context, even a small-scale accident could have the potential of an environmental disaster. 

Reliability, availability, and maintainability (RAM) programs are an integral part of any risk management system. Note Some companies use the letters RAM to mean Risk Assessment Matrix.)... 

DEVELOPING A HAZARD ANALYSIS AND RISK ASSESSMENT MATRIX... 

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

Having an accepted and well-understood risk assessment matrix makes reaching consensus easier to assess the severity of consequences, determine event probability, define the risk, and rank risks in priority order. 

A risk assessment code, using the agreed-upon risk assessment matrix. 

Risk is determined by assessing its two components the severity of harm or damage resulting from a hazard-related event and the probability that the event could occur. Table 15.1 presents a sample Risk Assessment Matrix, illustrating how these two factors are combined to obtain a risk level. A review of the many published risk assessment matrices appears in chapters titled A Primer On Hazard Analysis And Risk Assessment and Risk Scoring Systems in this authors book titled Innovations In Safety Management. 

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. 

A Brief Overview of Selected System Safety Analytical Approaches Working with the Risk Assessment Matrix Preliminary Hazard Analysis Energy Flow/Barrier Analysis Failure Modes and Effects Analysis Fault Tree Analysis... 

As far as methods for risk assessment at workplace are concerned. Risk Assessment Matrix method is the most popnlar one. Risk estimation entails evaluating both the severity and frequency of hazardous events. 

A major objective of most of these analyses is to produce meaningful risk assessment data to aid in prioritizing hazards, allocating resources, and evaluating the acceptability of risks associated with these hazards. A common tool for assessing risk is the risk assessment code (RAC). The RAC is the number associated with a given level of severity and a given probability of occurrence as shown on a risk assessment matrix, with severity on one axis and probability on the other (Table 2-1). 

The PHL report is generally a narrative with a summary that highlights significant risks and recommendations. It should also contain a brief project description, a discussion of the PHL methodology used including the risk assessment matrix, requirements for additional information, recommendations for follow-on studies or analyses, and the PHL worksheets. 

Risk Assessment 1 2A (see Tables 2.1—2.3). Because the severity of such an occurrence is categorized as critical (i.e., severe injury, occupational illness, or system damage) and, because of the proposed system design, the probability of a mishap of this nature is categorized as frequent (i.e., likely to occur frequently), the risk assessment matrix assigns this risk a classification of 2A, which, according to Table 2.3, is an unacceptable level of risk. 

Risk Assessment 2 2B (see Tables 2.1-2.3). Liquid contact with parts is assessed as a critical occurrence, since the potential damage to the parts would most likely render them unusable. The likelihood of such a mishap is considered highly probable, based on the proposed system design. The risk assessment matrix (Table 2.3) indicates that a risk classification of 2B is unacceptable. Therefore, the system safety precedence tells us that such risk should be approached with the intention of elimination, or possible reduction to an acceptable level. 

Risk Assessment 4 3D (see Tables 2.1-2.3). Although weld seam failure can occur, its likelihood can be described as remote (i.e., unlikely, but possibly occurring in the life of an item). If the seams were to fail, the severity of the outcome would be assessed as marginal (i.e., minor injury, occupational illness, or system damage). Hence, the risk assessment matrix classifies this incident as acceptable, with a review by engineering and management personnel. 

Risk Assessment 5 4D (see Tables 2.1—2.3). The probability of tank leakage might be assessed as remote, especially if X-ray analysis of welded seams is performed prior to installation. Even if it were to leak, the resulting severity would be considered negligible (i.e., less than minor injury, occupational illness, or system damage) since the liquid would be contained in the concrete pit area. Therefore, the risk assessment matrix recommends that such a risk be classified as acceptable, without review. 

Risk Assessment 6 2C (see Tables 2.1-2.3). Obviously, critical mishaps such as those described above might possibly occur during the life cycle of this system ( occasional ). The risk assessment matrix indicates that such risk is undesirable and must, if at all possible, be controlled or reduced to acceptable levels or eliminated totally. 

Class " Energy Hazard Risk Assessment Matrix s... 

Risk the probabihtyofoccurrence and the severity of a mishap. There are six probabihty levels Frequent, Probable, Occasional, Remote, Improbable, and EUminated. There are four severity levels Catastrophic, Critical, Marginal, and Neghgible. The levels form a risk assessment matrix, shown in Figure 36-1. 

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

Identify the levels of acceptable risk approved for the project that appear in the risk assessment matrix. 

Assess risk for each hazard applying the approved risk assessment matrix. 

Re-evaluate the risk with the controls in place to identify any reduction in classifications in the risk assessment matrix. 

Table 2.1 Level 1 qualitative risk-assessment matrix...

As a guide to help the risk assessment, the department provides a risk assessment matrix to highlight potential problems to the clinical pharmacist, see Fig. 2.2. 

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