The Triple Constraints: A valid set of criteria to measure IS-project success?

Since the 1960's many authors accepted the triple constraints (time, cost, specification) as a standard measure of success and this still appears to be extremely important in evaluating the success of ICT projects. However, the parties involved may perceive the terms “success” or “failure” differently. A quasi-experiment (gaming) was developed to determine the measures for success used by the different parties involved in an ICT project. The results of this quasi experiment were analysed using probabilistic feature models. This research indicates that the impact of the triple constraints on the judgement of success is rather small. Other criteria, as there are user happiness and financial or commercial success are far more important.