The objective of this paper is to present the possible contribution of an innovative method referred to as qualimetrics intervention-research because it helps measuring the impact of action-research processes, not only from a qualitative point of view, but also from quantitative and financial ones. It brings to light the necessary requirements or conditions to obtain the creation of generic contingency in the field of action-research through a "Contradictory inter-subjectivity" principle. These concepts are illustrated with reference to an experiment conducted in a construction site on behalf of the ministry of public works. The objective was to design innovative methods to reconcile quality-safety and environmental standards with budget constraints.