A "Big Data" approach was used in part to study the use of printed paper in a 700 bed paperless hospital, in part to study the usefulness of the approach. Between 1,2 and 1,5 million pages were printed each month, corresponding to 10% of a citizens' monthly paper use. The identified use of printed paper did not seem to be high compared to other organisations. The big data approach was not able to answer all our questions, primarily because we did not get log data for the source programmes for the printing. The approach could consequently not provide the data needed to reduce paper printing.