Another popular measurement technique is multivariate testing, in which you test many different variations of the same page all at once.

FORBES: Want Results? Become Obsessed With Data

Our multivariate estimates suggest that licensing has about the same quantitative impact on wages as do unions that is about 15 percent.

FORBES: Declining Union Membership Does Not Mean Declining Wages

This could mean that the startup acquires a small group of beta testers and conducts a multivariate run on an application or a feature set.

FORBES: K5Launch: How an Accelerator Can Supercharge Your Startup

The concept of a global ocean observing system grew from the realisation that understanding and forecasting climate change would require a long-term, multivariate ocean observing system.

UNESCO: Social and Human Sciences

For example, Amazon can run a multivariate test in a matter of minutes, where a smaller site with lower traffic volumes might take weeks or months to collect the necessary data for optimization.

FORBES: 3 Ways to Monetize Large Ecommerce Sites

Axa Rosenberg's model involves thousands of multivariate regression calculations, but it all boils down to the same thing that old-fashioned value investors are looking for: an estimate of fair value, which is then compared with current stock prices.

FORBES: Revenge of The Nerds