In the 1980s, Robert Ronstadt of Babson College conducted a 12-year study into the subsequent careers of the graduates of the school’s MBA program in entrepreneurship. post 
The most successful graduates were those who created multiple ventures and lengthened the duration of their entrepreneurial careers by using what Ronstadt calls the “Corridor Principle.”
> The Corridor Principle states that the mere act of starting a venture enables entrepreneurs to see other venture opportunities they could neither see nor take advantage of until they had started their initial venture. pdf
.
Richard Sears points out that an entrepreneur skill is rapidly assessing opportunities (checking behind the doors in the corridor) once one has a going concern.
We suspect that there is a corridor effect present in all system design activities.
See On Page Lifetime for excerpts of deliberation.
See Accumulating Opportunity where this is a given.