Order Trajectory Analysis in Hospital Information System*

Two of the most important roles of hospital information system (HIS) is to transfer clinical orders issued by doctors and nurses to other division and to store results of executed orders. Thus, the numbers of issued and executed orders will reflect the clinical activities in large hospitals. This paper proposes a visualization technique, called order trajectory analysis which visualize the temporal sequences of the number of orders. Then, clustering is applied to the order trajectory in order to show the similarities between clinical divisions.