The three modules of DSSs are not as distinct as they may seem from this or any discussion of the topic. This is a logical view of the modules, rather than what you might see if you actually examined the application s code. The data management module should be familiar to you from Chapter 7, Data Management. This module, like any DBMS, allows the system to select and manipulate data relevant for analysis by the model management module. The word personal in personal DSSs is there simply to distinguish DSSs in use by individuals from GDSSs.
Some textbooks try to distinguish between what if analysis and sensitivity tests.
Practically, there is no difference between the two. Also note, that many EIS vendors develop both DSSs and EISs and often do not distinguish between the two in promoting the products.