An Ergonomic Evaluation of a Job (Engine Mounting on Frame Body) In an Automobile Industry with Post Counter Measure Assessment Study

Rajat Kumar Saha


Introduction & Objective: Even after automated industrial operations, manual handling is still evident with development of physiological fatigue alongwith ergonomic risk factors which invariably reduces human performance capacity. A cross-sectional scientific study was conducted in an automobile industry to assess physiological strain & ergonomic risk factors with an aim to make job comfortable & less risky.

Method: Study was conducted on 8 randomly selected employees of frame assembly section in an automobile industry. Job was manual unloading of automobile engine weighing 30 kg from conveyor tray, carrying it to another conveyor 2 meter apart & mounting on frame body. Resting HR, BSA & BMI of the workers were computed. Peak HR, oxygen saturation & later, recovery HR was recorded. NIOSH lifting index (LI) & RULA score for postural stress were assessed.

Result: Work-site dimensions of conveyor tray carrying engines- vertical height 52 cm from ground, horizontal distance 15 cm & frequency approx. 3/ min. Physiological work stress assessment (peak heart rate, oxygen uptake & energy expenditure) were 129.5±7.07 beats/min, 1.27±0.15 lit/min & 6.42±0.71 kcal/min respectively. Physiological recovery was 98.95±11.47, 91.10±10.23 & 83.70±7.35 beats/min. Mean oxygen saturation was 98.12% & mean resting heart rate 74.63 beats/min. LI was 4.04±0.53 and mean postural stress through RULA score was assessed to be 4.55±0.42

Conclusion: Physiological strain and postural strain were high. The cause of high RULA score & LI could be ascertained to job at shoulder height; vertical factor of LI was primarily responsible for which recommendation was conveyed for worksite design modification (subsequently done & recorded).


NIOSH lifting index, RULA, Physiological strain parameter, physiological recovery status, mechanical manipulator.

Full Text:



K. Lange Andersen etal: Fundamentals of Exercise Testing, WHO, 1972 p-58-72,

Denolin, Lange Anderson et al : Exercise test in relation to cardio vascular functions World health organization pub 1968, 338,

Thomas R, Waters, Vern Putz Andreson, Garg A, Application manual for Revised NIOSH lifting equation , Center for disease control & prevention, National Institute of Occupational health & safety, cinncinati, ohio USA, January 1994

Lynn McAtamney and E Nigel Corlett: RULA: a survey method for the investigation of work-related upper limb disorders. Applied Ergonomics 1993,24(2), 91-99

Saha P.N, Datta S R,Banerjee P.K, Narayanee GG, An acceptable work load for Indian workers. Ergonomics, 1979, 22, 1059-71.

Aminoff T, Smolander J, Korhonen O, & LouhevaaraV. Physiological strain during kitchen work in relation to maximal and task specific peak values. Ergonomics, 1999, 42, 584-92,

Brouha L Evaluation of the physiological requirement of jobs .in physiology in industry, evaluation of industrial stress by the physiological reactions of the workers. Pergamon press 1960,p82-108

Astrand PO Rodhal K. Text Book of work physiology, New York Mc graw hill,1986, p 501-2

Ahonen E, Venalainen M, Konone U, KlenT.The Physical strain of Dairy farming. Ergonomics 1990,33,1549-55

Sen. R.N, Banerjee S. A nomogramme for calculating the surface area of body of Indian Ind. J. Med., Res. 45 (33-34), 1964.

Ghosh P.C, Datta S.R. etal: Investigation on Loaders in Mumbai Dock (Physiological Evaluation of Work Stress) Central Labour Institute, Industrial Physiological Division, Report No.9 Part -II, 1978.

Ghosh P.C, Datta S.R et al: Investigation on loaders in Mumbai Dock (Physiological Evaluation Of Work Stress) Central Labour Institute, Industrial Physiology Division, Report No.8 part-I, 1978.


  • There are currently no refbacks.

Copyright (c) 2016 International Journal of Healthcare Education & Medical Informatics

License URL: