In the context of the implementation of program evaluation, the evaluators frequently make a conformity evaluation. This type of evaluation consists in the measurement of level of respect to the initial model proposed in this program. It is not sufficient to explain the differences observed between the initial planning and the program actually implemented. In the context of two evaluations of large-scale strategies, the Youth Montreal Project and the New approach, New strategy (NANS), a conceptual framework inspired by the literature in the field of the organizational analysis and the sociology of the innovation was used to analyse the application of these programs. The utility of such framework is illustrated from the results of these two evaluation projects.