ergonomic assessment of workstation and rula analysis of

By:

List the names of group members

Chinmai Kethineni

Saraswathi Guduri

Shiva Teja Sepuri

Sai Surya Teja Sreedhara

ERGONOMIC ASSESSMENT OF WORKSTATION AND RULA ANALYSIS OF EMPLOYEES AT JUMP TRADING

CENTER

Under the guidance of

-Dr. R. Pope-Ford

Introduction and Background

Cumulative trauma disorders (CTDs) are injuries of the musculoskeletal and nervous systems .

caused by repetitive tasks, forceful exertions, vibrations, mechanical compression. CTDs are also called as repetitive motion disorders (RMDs).

our study on CTDs ,is conducted in JUMP trading simulation and education center, Peoria.

JUMP TRADING SIMULATION

• Formed by the collaboration of OSF health care and university of Illinois college of medicine

• Deals with the simulation education and as well as research programs.

• JUMP is having three types of workstation designs: Tree Arch design Fish Bowl design Open Island design

• The designs are distinguished based on the type of alignment of the work stations, on the seating of the employees.

• initiated these three designs to check for the comfort of the employees

Objective:To check for the Influence of the work station and work performed by the employee

causing CTDs. To control the risk factors in the work environment

Methodology:To understand about the extent of CTDs in the employees we use, RULA (Rapid Upper Limb Assessment) McCauley- Bush Fuzzy Rating Scale for Evaluation of Cumulative

Trauma Disorder Risk

RISK FACTORS:

Level of CTDs are found based on survey conducted on different risk factors and the risk factors are as follows Task-Related Risk Factors Personal Risks Organizational Risk Factors

These risk factors are found by interviewing employees and they are noted based on their intensities.

CALCULATIONS

Task-Related Risk:

R1 = F(T) = a1w1 + a2w2+ a3w3 + a4w4 + a5w5 + a6w6

Personal Risk:

R2 = F(P) = b1x1+ b2x2+ b3x3+ b4x4 + b5x5 + b6x6

Organizational Risk:

R3 = F(O) = c1y1 + c2y2 + c3y3 + c4y4 + c5y5 + c6y6

The final calculations are calculated based on module risk for comparison of the results of various employees

Z = d1R1 + d2R2 + d3R3

TASK RELATED RISK FACTORS:

Ranking Factor Relative Weight

1 Awkward joint posture  0.299

2 Repetition  0.189

3 Hand tool use  0.180

4 Force  0.125

5 Task duration  0.124

6 Vibration  0.083

PERSONAL RISK FACTORS:

Ranking Factor Relative Weight

1 Previous CTD  0.383

2 Hobbies and habits  0.223

3 Diabetes  0.170

4 Thyroid problems  0.097

5 Age  0.039

6 Arthritis  0.088

ORGANISATIONAL RISK FACTORS :

Ranking Factor Relative Weight

1 Equipment  0.346

2 Production rate/layout  0.249

3 Ergonomics program  0.183

4 Peer influence  0.065

5 Training  0.059

6 CTD level  0.053

7 Awareness  0.045

MODULE RISK FACTORS:

Ranking

Module

Relative Weight

1 Task   0.637

2 Personal   0.258

3 Organizational   0.105

RESULTS:

Risks/ Subject

Task-Related Risk

Personal Risk

Organizational Risk Z Numeric Risk Level

1 0.4183 0.2076 0.5331 0.3759 0.21-0.60

2 0.1224 0.1595 0.2868 0.1492 0.0-0.20

3 0.3048 0.34 0.5685 0.3415 0.21-0.40

4 0.3048 0.0524 0.4215 0.2519 0.21-0.40

Categorization of aggregate numeric risk levels

Numeric Risk Level Expected Amount of Risk Associated with Numeric Value

0.00 - 0.20 Minimal  risk:  Individual  should  not  be  experiencing  any  conditions  that  indicated  musculoskeletal irritation 

0.21 - 0.40 Some risk:  may be in the very early stages of CTD  development.    Individual  may  experience  irregular  irritation  but  is  not  expected  to  experience regular musculoskeletal irritation 

0.41 - 0.60 Average risk: Individual may experience minor musculoskeletal irritation on a regular but not excessive irritation 

0.61 - 0.80 High risk:  Individual is expected to be experiencing regular minor or major musculoskeletal irritation 

0.81 - 1.00 Very  high  risk:  Individual  is  expected  to  presently  experience  ongoing  or  regular  musculoskeletal irritation and/or medical correction for the condition 

RULA

RULA was developed to evaluate the exposure of individual workers to ergonomic risk factors associated with upper extremity MSD.

The RULA ergonomic assessment tool considers biomechanical and postural load requirements of job tasks/demands on the neck, trunk and upper extremities.

A single page worksheet is used to evaluate required body posture, force, and repetition.

After the data for each region is collected and scored, tables on the form are then used to compile the risk factor variables, generating a single score that represents the level of MSD risk.

No need for an advanced degree in ergonomics or expensive equipment

Score will be assigned for each of the body regions: upper arm, lower arm, wrist, neck, trunk, and legs.

RULA SCORE BEFORE SUGGESTION-EMPLOYEE(1)

RULA SCORE BEFORE SUGGESTION-EMPLOYEE(2,3,4)

SUGGESTIONS:

Works station Support pad for keyboard Rising desk for all employees Automation in simulation testing room Periodical breaks for the employees Posture foot stool Keep hydrated once in half an hour Sit up and stop slouching

RULA SCORE AFTER SUGGESTION- EMPLOYEE(1)

RULA SCORE AFTER SUGGESTION OF EMPLOYEE(2,3,4):

FEMALE SUBJECT’S COMFORT LEVEL COMPARED TO THE MALE SUBJECTS

Female

Female

Female

Male

Male

0 0.2 0.4 0.6 0.8 1 1.2

Chart Title

Comfort Level with the work station

Gender

2 3 4 5 6 7 8 90

1

2

3

4

5

6

7

Male vs Female

Female Male

Pain Description

Pain De

scription

Female subjects are entitled to more pain when compared to male subjects. This can be attributed to their comfort with the workstation.

CONCLUSIONS:

TREE ARCH configuration Regular interaction with ergonomist Important gears or accessories like Keyboard pad to comfort their

wrists, custom made chairs to support their lumbar system An eye protection screen to reduce any optical discomforts due to

long use of computers were suggested by the team

QUALITRICS:

Qualtrics is a private research software company.

Qualtrics software enables users to do many kinds of online data collection[ and analysis including market research, customer satisfaction and loyalty, product and concept testing, employee evaluations and website feedback.