Porquê fazer um Plano de Negócio?
Why should you make a business plan, unless you want to use it to get funding?

There are plenty of other reasons. In fact, the business plan can be a very useful instrument for the entrepreneur in 3 phases: http://empreendedorismoemarketing.blogspot.com/2009/09/porque-fazer-um-plano-de-negocio.html