Qualitiy and efficacy control in the area of critical care medicine also includes a requirement for an analysis of clinical activities. To date, little experience has been gained in the performance of such analysis. With the aid of a mobile data-collecting device, we recorded all the activities of physicians engaged in morning patient care, over a period of 41 working days, covering a total of just on 90 hours. The median duration for a routine care programme is 41 minutes and is broken down as follows: 40 % for documentation, 29 % for information collection, 26 % for patient treatment, and 5 % for communication with colleagues. Improvements in efficacy may be expected in particular in the areas of documentation and the search for information in the patient's medical record.