Type of Document Master's Thesis Author Thepvongs, Somchart Author's Email Address sthepvon@vt.edu URN etd-51798-151154 Title Use of Integrated Process Control Displays in Work System Design Degree Master of Science Department Industrial and Systems Engineering Advisory Committee
Advisor Name Title Kleiner, Brian M. Committee Chair Sturges, Robert H. Committee Member Williges, Robert C. Committee Member Keywords
- mental workload
- control charts
- three-dimensional displays
- Macroergonomics
- signal detection theory
Date of Defense 1998-06-04 Availability unrestricted Abstract Given the continuing deployment of total quality control and total quality
management initiatives by organizations, employees have seen changes in
their work environment. Furthermore, the impact of downsizing has
resulted in operators becoming responsible for the quality of their own
processes. This study tested the impact of various display alternatives
of control chart data on decision performance and mental workload.
The control charts were shown as multiple two dimensional displays, a composite
two dimensional display, and a composite three dimensional perspective
display.
Multiple two dimensional displays were found to have significantly higher
decision accuracy and decision confidence ratings than either composite
displays. No significant difference in decision accuracy and decision
confidence ratings was found among the composite displays. The type
of display did not have a significant effect on decision time. Mental
workload was also found to be significantly affected by the type of display
used. Multiple two dimensional displays imposed significantly lower
levels of mental workload than either composite display. No significant
difference in mental workload was found among the composite displays.
These results indicated that multiple two dimensional displays should be
used when control chart data from multiple processes must be displayed.
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