Identification and evaluation of human error in tower crane operation using SLIM method

Human error is the most common cause of crane transfer accidents in the construction industry. Operator errors are caused by a variety of factors during lifting operation by the crane (SLIM) (Success Likelihood Index Model), as a simple and effective way to detect human errors.

In this study, the SLIM method was used to evaluate and manage human errors in equipment displacement operations by tower cranes. After forming the team of experts, the effective PSFs in the crane management activities identified were identified. Then the rate and weight of these factors were determined. Finally, by calculating the total SLI, the probability of human error for each PSF was calculated.

First, four effective PSFs in tower crane guidance were identified by experts. Of the identified PSFs, training received the highest weight and the highest likelihood of success was calculated for the correct use of operating lever during displacement and discharge. By calculating the HEP based on the calculated SLIs, it was found that the mentioned activity had the highest HEP of 3×10-3

SLIM is an appropriate method for determining the probability of human error. Since reducing the likelihood of human error can lead to a reduction in the incidence of accidents, therefore, appropriate measures can be taken to effectively reduce the likelihood of human error and increase the fault tolerance power of tower crane operations.