20100925 - Young, Evaluation of dust control technologies...effectiveness, usability

Evaluation of dust control technologies for drywall finishing operations: Industry implementation trends, worker perceptions, effectiveness and usability by Young, Deborah Elspeth, Ph.D., Virginia Polytechnic Institute and State University, 2007 , 191 pages; AAT 3310218 My Interest: 1) Usability evaluation instrument. 2) How the 16 participants did usability evaluation. Action: Medium-low priority to read the specific parts of Dissertation in future. Problem Statement Drywall finishing operations have been associated with worker exposure to dust that contains known particulate respiratory health hazards, such as silica, talc, and mica. Despite the existence of engineering, work-practice, and personal protective equipment (PPE) control technologies for the mitigation of this hazard, worker exposures persist in the drywall finishing industry. Research Goal This research employed a macroergonomic framework to evaluate this problem and identify barriers to dust control technology adoption in the key subsystems: personnel, technological, and organizational. Methodology & Results – First Study In the first study, the organizational subsystem was evaluated through a telephone interview of 264 drywall finishing firm owners. This study found the most commonly used dust control technology was respiratory protection. Cost, usability, environmental factors, and productivity were barriers identified in preventing adoption of other technologies. Methodology & Results – Second Study In the second study, of the technological subsystem, 16 participants performed simulated drywall finishing tasks with each of four methods, in a laboratory setting. Dust particles were monitored and compared among the technologies used. Participants performed usability evaluations of the four tools. The ventilated sander produced less respirable-size class dust than did the other three tools. The block sander produced more dust than the other three tools. Usability evaluations revealed that the block sander was easiest to learn, easiest to use, and perceived to be the best overall, while the wet method and pole sander were considered to have poor usability in terms of ease of use and productivity. Usability problems associated with perceived comfort and ease of use were identified for the ventilated sander, but it was tied for "overall best" with the block sander. Methodology & Results – Third Study The third study, of drywall finishing worker perceptions, employed the Health Belief Model to assess barriers to technology adoption, risk, susceptibility, and benefits. Results showed that workers have a high perception of the risk associated with drywall dust, but a lower perception of individual susceptibility to disease as a result of occupational exposure. Barriers to the use of dust control technologies were identified as being associated with organizational and usability factors. Chapter 3: Evaluation of Drywall Sanding Technologies Chapter 4: Evaluation of Worker Perceptions Appendix B: Study 1 Survey Instrument Appendix C: In-depth Interview Guide Appendix D: Usability Evaluation Instrument – Individual Technology Appendix E: Usability Evaluation Instrument – Technologies Comparison