At some point an entrepreneurial venture reaches the point of being an established business. What that point is is arguable. Some definitions specify a certain dollar sales for a certain length of time, others say that once the growth rate has leveled off, a business is no longer in its entrepreneurial stage. While reaching a point of "being there" is an achievement, a real concern for most businesses is that somehow becoming an established business means that the entrepreneurial spirit has been lost. Hence, the growth of intrapreneurship - fostering entrepreneurism within established organizations.
Here is some information about various aspects of this type of entrepreneurism:
Intrapreneurism as a field is just reaching a more stable point in growth itself. A variety of models are in practice industrywide. More information about workable models is surfacing daily. The dialog between entrepreneurs and intrapreneurs on common challenges has been limited to-date, but has the potential for providing substantial synergy for both efforts.