EVALUATION OF PHYSICAL AND MENTAL FATIGUE IN AN ASSEMBLY LINE

Authors : Aslı Kahya, Ayça Recal, Yasemin Sevincer, Tülin Gündüz, Seda Özmutlu

Pages : 380-395

View : 34 | Download : 16

Publication Date : 2021-12-31

Article Type : Research

Abstract :This study focuses on operator-based ergonomics analysis of the work performed in different stations. This study was carried out at a car seat production assembly line in automotive industry. The workloads of the employees cannot be uniform ergonomically, however the same relaxation allowance was given for all types of work. The relaxation allowance is 6% at MTM (Methods Time Measurement). In this study, fatigue rate is studied under two headings as physical and mental, contrary to the usual physical fatigue only approach. Body moves for lower arm, upper arm, wrist, neck, legs are analysed with MURI and REBA (Rapid Entire Body Assessment) Mental demand, physical demand, effort, performance, temporal demand and frustration were studied with NASA-TLX (NASA Task Load Index) to assess mental fatigue. Physical and mental fatigue were calculated with weights using the AHP method. New resting time coefficients were calculated for each different working type.
Keywords : Physical Fatigue, Mental Fatigue, MURI, REBA, NASA-TLX, AHP