When we model systems and data models, we model them for the problem we're solving today, and with enough experience you can anticipate some future problems...b

When we model systems and data models, we model them for the problem we're solving today, and with enough experience you can anticipate some future problems...but not all. Business is dynamic and software data models are relatively rigid. That's why business users love Excel - it's the javascript of the database world...you can slap something together without too much fuss and 60% of the time it'll work every time.