The analysis of the form in the architectural design: from the project to the execution

For any given set of experimentally surveyed coordinates, there are some baseline data that are based on those we consider objective if we take care to specify the tolerances of the tools employed. The interpretation of the geometric model requires founded methodological reflections. In the present case study the question might be: what was the configuration of the façade's projecting elements? The mathematical computation supports the hypothesis but it is the instrumental survey that legitimizes the choices in that it measures the gap between the numerical experimental model and the more abstract one of ideas. This information allows to set forth hypotheses concerning the conflicts generated during the execution work in progress.