But because the explanation adds great bulk to the product of such a presentation, presenters usually find that they either have to sacrifice detailed data or have to reduce the range of types of data in order to get the important points across in the available time or space. However, the limitations of that solution are just as evident when you think about applying it for another purpose to a specific audience. There is clearly a middleground, somewhere between the President's Report and the warehouse mechanism, that will provide enough contextualization to promote both greater access and greater utility of the data, as well as detailed data. Here you can view relatively detailed data with enough explanation of context to ensure appropriate understanding. The Data Digest is a model that seems worthy of emulation by departments dealing with slightly more specialized information.
Data marts reduce the range of data to a more manageable span.
For example, a data mart could provide a subset of data that reduces some confusion about data elements simply by making available only the one that users most commonly need.