Human reliability mistakes

One method for analyzing human reliability is a straightforward extension of probabilistic risk assessment (PRA)—in the same way that equipment can fail, so can a human make mistakes and slips. One technique for predicting human error rates is the Technique for Human Error Rate Prediction (THERE), which was developed in the 1950s. As with other PRA techniques, THERE models can use either point. 

Discussion of and research into human error focusses on slips, mistakes, incidents and accidents and their internal and external mechanisms. Research on accident liability centers on work- or traffic-related accidents emphasizing personal variables as an explanation of the occurrence of accidents. Systems variables such as workplace design or work environment are not considered systematically. Modern human factors approaches examine the joint effects of personal, organizational and technical factors on human reliability, employing accident-independent as well as accident-centered safety analysis methods. 

With regard to the accuracy and reliability of measurements, how can we determine at which point there is a human mistake ... 

Not all components require independent verification, because the possibility of mispositioning may be quite remote or because the effect of a mispositioning may not be significant to safe and reliable plant operation. Independent verification recognizes the human element of component operation that is, any operator, no matter how proficient, can make a mistake. The independent verification process is one that must fully integrate all aspects of plant operations and maintenance personnel involved in the day-to-day operation of plant systems. 

Operators training, while having a focus on particular equipment should also provide a familiarity with the overall process. This helps instill a sense of ownership and allows them to understand how their actions affect operations farther down the line. Mistakes due to improper training can have serious consequences on product yields or field reliability. Human error can be minimized by a combination of training, proper equipment and tools, and attitude. Often operators assume the end product can be reworked if not assembled properly. Even if true, rework is a costly solution to errors, especially if they were avoidable. 

---