Theses and Dissertations


Tinghao Wu

Issuing Body

Mississippi State University


Duffy, Vincent G.

Committee Member

White, Keith M.

Committee Member

Jin, Mingzhou

Committee Member

Smyer, William N.

Date of Degree


Document Type

Graduate Thesis - Open Access


Industrial Engineering

Degree Name

Master of Science


James Worth Bagley College of Engineering


Department of Industrial Engineering


This study was conducted to assess the validity and reliability of the Virtual Build methodology for ergonomics design and analysis. Thirty-six human subjects participated in this study and performed a set of six tasks. The tasks were performed twice in both real and virtual environment. The subject?s motion in performing tasks was analyzed by ergonomics assessments by using Virtual Build methodology. Criteria-related validity was evaluated by comparing the Virtual Build ergonomic assessment results with manual calculation. Test-retest reliability was evaluated by correlating ergonomics assessment results between two trials. The result shows that the Virtual Build methodology is reliable for ergonomic assessments. 48 out of 51 reliability index scores are higher than 0.8. The Virtual Build with virtual environment has lower over-time reliability performance than the real environment. The t-test shows that the Virtual Build is valid for 1991 NIOSH lifting equation assessment when using real environment. Some improvements in enhancing human perception need to be done to make Virtual Build valid when using virtual environment.



Digital Human Modeling||Motion Capture||Virtual Environment||Virtual Build||Reliability||Validity