In addition to the numerous treatment calculations and evaluations offered by Visual Water Designer, the software also provides the user with a built-in theory section that summarizes all of the equations/theory used in the various calculations.  In order to perform many of those calculations, assumptions may be required.  Visual Water Designer allows the user to view those assumptions and change them at any time, providing as much flexibility as possible. The following screenshots provide a sampling of the theory section and assumption options available as part of Visual Water Designer:

Theory tab for clarifier design (no assumptions):

 Theory tab for flocculation design (note assumptions):

 Assumptions database form: