Exposure codes

Transport and Exposure Analysis. When the Run/Print Reports/ Worksheets option is chosen at the main menu, a submenu is displayed with selection options that enable the user to execute the MEPAS transport and exposure codes and print results from the model run. 

Outlier analysis also revealed one subject LAN9356 was miscoded. The subject, originally coded as moderately exposed (MOD), actually worked in Aircraft Fuel System Repair Shop and handled fuel-soaked fire suppression foam on the day of the test. After the subject s exposure code was changed and the Davis Monthan ABF LOW-exposed subjects from Monday and Tues-... 

If RACs are, in fact, going to serve as the drivers in the system and the basis for risk acceptance and resource allocation decisions, the numbers generated must have a positive correlation to the risk involved and to the resources required to control the hazard. A universal RAC matrix would provide a means of comparing relative risks associated with multiple projects, evaluating the allocation of funds, and determining the cost-effectiveness of various controls. Ideally, this universal risk assessment code matrix could provide an evaluation of risks in absolute as well as relative terms. Chapter 12 contains a proposed universal RAC matrix (Total Risk Exposure Codes). The use of a meaningful, quantified, expanded universal RAC matrix may represent a practical approach to probabilistic risk assessment. 

Review the Total Risk Exposure Code matrix and risk acceptance criteria in Chapter 11. Adopt the risk assessment and acceptance criteria and methodology (as presented or as modified by the planning group) or develop and adopt alternatives. 

Ten exposure codes (Table 11-4) represent estimates of the total number of accidents for the system.The low end of the scale (exposure code of 1) rep-... 

Figure 11-6 Total risk exposure code (TREC) matrix.

The total risk exposure code is then determined by adding the severity code and the exposure code (Fig. 11-6). 

Define and discuss total risk exposure codes. 

If an identified hazard is capable of causing 250 fatalities and causing 50 million in property damage and other losses, what is its severity code If this hazard is associated with certain model of aircraft with an expected service life of 25 years, what is the exposure code, given that the fleet has 200 aircraft and the hazard is estimated to be likely to result in an accident no more than once per 5 million flying hours (assume 2,000 flying hours per aircraft annually) What is the TREC What would be the estimated losses associated with this hazard over the life of the system ... 

Therefore, extreme value projection may be useful in calculation probabilities to be used for risk assessment codes or total risk exposure codes based on actuarial data. Extreme value projection can also be useful in communicating hazard information to management and may aid in drawing management attention to a problem before a serious accident occurs. 

All work injury and illness cases submitted for inclusion in the OHS database are coded except for cause of accident or exposure code. This latter code is, presently, optional in the OHS. 

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