A prospective observational study in the Intensive Care Unit and the Medium Care Unit in a university hospital in Amsterdam. Recent studies show that administrative tasks occupy more than 30% of the workload. One-third of these administrative tasks is unrelated to care. The administrative workload of physicians and nurses will be observed and quantified using two different methods. The amount of time physicians and nurses are logged on into the patient data management system (PDMS) will be measured and the time spent on different work tasks will be monitored with a work sampling method. Two different patient data management systems will be compared.