Summary of Class Meeting of March 1, 1999 We worked on a second example of computing the bang metric, this time with a function strong application. The calculation in this case is much more involved than for a data strong application as we did last time. If you have a hybrid application, you try to divide it into function strong and data strong components and compute the bang for each component separately. Then you can add the bamgs to form the bang of the overall application. Increasingly, applications tend to be data strong rather than function strong. An application is function strong only when it involves complex calculations, or extensive editing and rearrangement, perhaps to format a complex report or display. Remember, however, that the ERD should involve only relationships actually explicit in the specifications.