[Representation of a method for identification of the best safe contractors by Fuzzy Input Efficiency Profiling and AHP]

Health, Safety and Environment [HSE] performance measurement of the contractors and identification of the best ones can make a perception of the past changes in their HSE performance. Consequently, this may motivate them and provide an opportunity to improve their quality of services. The aim of this study is to rank the contractor-companies of one of the Iranian steel manufacturing companies considering their safety behavior and also to determine the best combination of contractors-companies. Safety behavior sampling method used to determine the status of unsafe acts. The fuzzy efficiency numbers of each input were ranked by Chen and Klein method. To obtain a final ranking AHP was applied. The obtained rankings by FIEP-AHP were compared to the ranking of DEA. Results indicated that the most frequent unsafe behaviors were related to not- using or miss-using the PPE, using broken tools and inappropriate working condition respectively. A significant relationship between experience, education and age with safety behaviors was obtained [p<0.05]. Results showed that companies' number 2 and 6 had respectively the best and worst ranks. Because FIEP increases the power of recognition especially when the number of DMUs is lower than inputs and outputs, it can be suggested as an appropriate model for determining the best contractor companies

integrated and multivariate model along with designing experiments approach for assessment of micro-and macro-ergonomic factors: the case of a gas refinery

The objectives of this paper are three folds. First, an integrated framework for designing and development of the integrated health, safety and environment [HSE] model is presented. Second, it is implemented and tested for a large gas refinery in Iran. Third, it is shown whether the total ergonomics model is superior to the conventional ergonomics approach. This study is among the first to examine total ergonomics components in a manufacturing system. This study was conducted in Sarkhoon and Qeshm Gas refinery- Iran in 2006. To achieve the above objectives, an integrated approach based on total ergonomics factors was developed. Second, it is applied to the refinery and the advantages of total ergonomics approach are discussed. Third, the impacts of total ergonomics factors on local factors are examined through non-parametric statistical analysis. It was shown that total ergonomics model is much more beneficial than conventional approach. It should be noted that the traditional ergonomics methodology is not capable of locating the findings of total ergonomics model. The distinguished aspect of this study is the employment of a total system approach based on integration of the conventional ergonomics factors with HSE factors