There are differing opinions in the academic literature regarding the value of pre and post-launch planning. The planning school argues that a formal approach to planning, including the writing of a business plan, leads to superior performance. An opposing view argues that learning should be emphasized over planning, and that planning actually has downsides, including a reluctance to deviate from the plan even in light of evidence that the plan may not be working (Mullins & Komisar, 2009).
This study looks at how much pre-launch and post-launch planning takes place in startup firms, and the difference that it makes. Also of interest is the degree to which entrepreneurs iterate their plans after their businesses are launched.
Barringer, Bruce R.
"HOW MUCH PRE-LAUNCH AND POST-LAUNCH PLANNING TAKES PLACE AND HOW MUCH DIFFERENCE DOES IT MAKE? (SUMMARY),"
Frontiers of Entrepreneurship Research: Vol. 30
, Article 3.
Available at: http://digitalknowledge.babson.edu/fer/vol30/iss9/3