Synchronized time-motion study in the emergency department using a handheld computer application.

Emergency departments present a challenging environment for workflow evaluation and measurement of the effect of information system interventions. This paper describes a time-motion data collection tool built as a handheld computer application. The tool allows mobility of the observer and the intuitive inter-face supports rapid selection of tasks and frequent changes in tasks. It also allows documentation of overlapping tasks, a common occurrence in the emergency department. Synchronized data collection across the different providers of care in the emergency department is demonstrated, resulting in a data set from which task/event sequences can be built, documenting the ED care of individual patients. This technique should provide a very useful tool in measuring the effect of process changes in this difficult-to-assess environment, particularly changes in the information system.