AN INTEGRATED MENTAL WORKLOAD ASSESSMENT APPROACH BASED ON NASA-TLX AND SMAA-2: A CASE STUDY
Journal Title: Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi - Year 2018, Vol 26, Issue 2
Abstract
Mental workload (MWL) has been considered as an important ergonomic factor for a long time influencing worker performance within complex systems. MWL research generally tend to focus on different applications of the National Aeronautics and Space Administration-Task Load index (NASA-TLX) method, which is a classical tool for MWL assessment based on weighted sum of ratings of six different MWL criteria. However, workers as decision makers (DMs) cannot or do not want to specify their preferences with the exact values due to the scale implemented in determining MWL dimensions’ weights and their ratings. These uncertain data can be modeled in a stochastic manner by using the Stochastic Multi-Criteria Acceptability Analysis-2 (SMAA-2) which is an effective decision support tool. In this context, an integrated approach based on NASA-TLX and SMAA-2 for MWL assessment is proposed in the study. A real life application of the proposed approach is conducted in the box letter manufacturing process. In this application, three problem scenarios are discussed by using NASA-TLX&SMAA-2 to rank six sub processes respect to MWL levels. Rankings obtained from the NASA-TLX&SMAA-2 method for three scenarios are the same. This paper found that the NASA-TLX&SMAA-2 approach provides more precise and distinctive results compared to the NASA-TLX method.
Authors and Affiliations
Elif KILIÇ DELİCE, Gülin Feryal CAN
Keywords
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