Validation construct items for the measurement model of permit to work using exploratory factor analysis

The aim of this paper is to demonstrate how the exploratory factor analysis (EFA) is utilised to validate permit to work constructs. The data for the study was obtained from the questionnaire survey distributed to 260 work leaders and workers at Petrochemical Plant Kerteh, Terengganu. The EFA is the method to validate the items at the respective construct of the measured variable. The items of the construct were developed prudently and carefully so that the items are measurable for the purpose of obtaining value of this measurement model. There are five construct under permit to work (PTW), namely work description, worksite inspection, hazardous activity, supporting document and close out, was developed for the purpose of this study. After the EFA has been performed, it was found that all PTW's construct, i.e., work description, worksite inspection, hazardous activity, supporting document and close out construct has satisfied the validity and reliability requirement and applicable for the study.