03/18/2010 05:12 am ET Updated May 25, 2011

10 Huge Companies That Radically Changed Their Business Plan

But for their companies to succeed in the long run, founders also need to be ready to fail. They need to be ready to learn from those failures and adapt.

See 10 huge business successes born from evolutions ?

Marc Andreessen, the serial entrepreneur who successfully created and sold two billion dollar companies -- Netscape and Opsware -- preaches this lesson:

"Trying to understand how a tech company is going to be successful is a little bit like looking at a sonogram and trying to predict the baby's hair color," Marc said recently.

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