Tracy (1995, p. 19) emphasises in his book that in the twenty-first century, tomorrow will be more different from today than in the past. Therefore today's corporations get to stay innovative, reinvent themselves continuously and have to design new business. In contrast to that, software mastery becomes more than ever the key factor for business success (Northrop, 2008, p. 12). In the twenty-first century, software pervades every sector and has become the bottom line for many organisations. Therefore, reusability plays a growing role for every business in today's rapid changing world...