The prophetic word for all people, as well as a description of the type of issues that plague many projects, in those days.
Design should make sure that the house you want to get built, and that the land you build it will not be cut, some underground caves. If you answered "yes, (Kornfeld 2001) I'm not sure if anything I can say will help you.
Like a house, a good data base is constructed with in advance, and with due care and attention to the needs of data that inhabit it, but can not be thrown ...