This study tested the effects of using ergonomic work pacing software (EMS - Ergonomic Management System) on typing (accuracy and amount of keying), and mouse work (frequency and duration of mouse use). The performance of fifty-six highly skilled computer software programmers, technical development staff and executives at Lockheed Martin were passively monitored using the EMS system for four weeks, to establish a baseline. The EMS system then was fully activated for all personnel, and work performance monitored for an additional four-weeks period. Complete keying error data were recorded for oneweek during the baseline and test periods respectively. Full activation allowed the EMS software to coach users to take periodic microbreaks throughout the day depending on their work rate (if workers are pacing themselves appropriately then the EMS will not need to provide rest-break alerts).

There was a statistically significant 59% improvement in work accuracy following implementation of the EMS system. There was no difference in total keystrokes or in mouse use between the baseline and test conditions. Results confirm previous research that showed that alerting users to take more short rest and break periods did not impair their overall keystroke and mouse use, but did improve their work accuracy. Economic analysis shows that in this situation the performance benefits alone that accrued from using ergonomic work pacing software show a return on investment of less than one-week. It is concluded that appropriate work pacing plays an important role in facilitating office work performance.

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