## Monday, June 19, 2006

### Informal Definition of Scalability

Scalability is a nonfunctional requirement that almost every product should possess. But specifically which metrics should you use to define it? A simple (and informal) definition of scalability is:

"More and more of it while still satisfying the other requirements."
You then must ask, "More of what?" And, "How much more?"

The Wikipedia entry for "scalability" mentions three forms: