However,these approaches are limited either by the strongly reduced form in which the necessary measures have been represented (patah and de Carvalho,2007)or by a small sample size (Ibbs and kwak,2000; kwak and Ibbs,2000). The most comprehensive examination of the benefits that are associated with PM was attempted by Thomas and Mullaly(2008), but they failed to provide concrete empirical proof of the benefits because of a lack of appropriate data form the surveyed organizations. Therefore,we still lack instruments to render the decision-making process more objective,rational,and fact-based for PM-related investments.