Explanation of PBA

If in Statement 1 it is thonght that a physical barrier on the energy source was not possible and practical, then select (A). Once (A) has been selected, it is not necessary to check (B), (C), and 4. Simply go to Statement 2. In looking at Statement 2, decide if a physical barrier between the energy source and the person was not possible and practical, then again choose (A) and proceed to Statement 3. 

In Statement 3, (A) is probably not the proper option because safety glasses possibly would have prevented the accident. Thus, proceed through the remaining statements (B), (C), and (D) to determine the proper selection. Because it is believed that a physical barrier on the person was possible and practical, it must be decided if it was not provided, provided but not used, or used but did not protect the person. Making that choice depends on personal experience and knowledge of the operation. 

The PBA matrix is simply the PBA statements in a different format. Normally, many accidents will be analyzed. When this occurs, the accidents are numbered so that choices for each accident will equal four. If the example was accident number 1, then (1) would be placed in the appropriate cells corresponding to the selections that were made. In this example, a (1) would be placed in cells lA, 2A, 3C, and 4A. This now completes the Physical Barrier Analysis of one accident. A listing of the steps for a PBA that is normally followed is  

Starting with number 1, read the abstract then the accident should be visualized. 

Ask yourself the first group of four questions on the PBA question list. Choose one of the four that best represents the opinion. 

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