[영문]Nurses?perceptions of effective use of their time are critical to successfully implementing IS changes. We examined the effects of implementing CPOE and nursing documentation in our emergency department with an anonymous survey of nurses and repeated time-motion studies. Emergency care nurses were positive about effects of CPOE, reporting needing less time to complete medication, laboratory, and radiology orders and less time spent clarifying orders. Their perceptions of time spent were congruent with observations from time-motion studies where combined computer-and-paper time and direct-patient-care time did not change significantly. Nurses also reported supplementing template options with free text; those who were more comfortable using computers reported supplementing template options more often than their counterparts, suggesting that assessments of users?expertise in computer use may influence their ability to maximize their use of the functionality of emergency department IS.