"Based on original planning documents, some of which only became available in Germany with the fall of the Wall, I showed in 1999 in 'The Schlieffen Plan Reconsidered' and in 2002 in Inventing the Schlieffen Plan that there never was a "Schlieffen plan". The "Schlieffen plan" was never implemented as a real German war plan, and was not the German war plan in 1914. Schlieffen never tested the "Schlieffen plan" in a war game. Schlieffen's real intent was to counterattack against the expected Franco-Russian attacks. The original "Schlieffen plan" document was a rough draft that was not typed until 1911. Indeed, in August 1914 the original document was the property of Schlieffen's daughters, who stored it with the family photos.

History professors and military historians who had written explanations of the structure and meaning of the "Schlieffen plan", which were now been shown to be wrong, did not take kindly to having their sacred cow slaughtered. The "Schlieffen plan" debate in 'War in History' continues to this day. The German Army called an international conference in 2004 to address my thesis. Inventing the Schlieffen Plan received several favorable reviews, including one from Sam Williamson in 'The Journal of Military History' and one in the Times Literary Supplement. There has also been much discussion of the Schlieffen plan debate on the internet."

http://terencezuber.com/schlieffen.html

Inventing the Schlieffen Plan: German War Planning 1871-1914 by Terence Zuber (Military Historian) Oxford University Press, 2002)