Risk Value Calculation Method for Moderate Risk Concentration Type at Qualitative Risk Analysis Phase

Abstract

:The risk analysis phase of construction risk management process is subdivided into the qualitative risk analysis that plays a major role, and the quantitative risk analysis acting as a supportive role. The traditional calculation method for quantifying a risk value that has been applied so far is an equation to multiply a probability by an impact simply, but its result shows the low risk value biased distribution. Although another equation that shows the high risk biased distribution as an alternative of traditional method was proposed, both of the low or high risk biased equations do not match with the statistical general knowledge that most natural phenomenons are close to the normal distribution. This study proposes a new risk value calculation method that is concentrated to the moderate risk value. Because the risk value distribution by a new method shows a normal shape similar to natural phenomenon, it helps to choose a middle level not biased to the low or high levels when choosing the level of risk response. Furthermore, it could contribute to improve the flexibility and rationality of risk analysis method by providing additional options for the risk value calculation.

Occupational hazards among dental hygienists: Risk level assessment of scaling work

“…To correct the low‐risk bias, a method of dividing the contour area into similar levels for each low‐, medium‐, and high‐risk levels on a two‐dimensional square contour line was applied. An occupational risk score of less than 0.1 was classified as low risk, 0.1 or more to less than 0.4 as medium risk, and 0.4 to 1.0 as high risk 24,25 …”

“…An occupational risk score of less than 0.1 was classified as low risk, 0.1 or more to less than 0.4 as medium risk, and 0.4 to 1.0 as high risk. 24,25…”