The criticality report as a tool for time and cost critical factors analysis for renovation and recovery intervention in Italy

The paper presents a system of critical factors defined after four years observation and study. The system is oriented to a multiplicity of actors - involved at different levels of the building process in the evaluation and control of the time and costs of an intervention - such as project managers, designers, safety coordinators and contractors' technicians. The different factors dealt with by the paper have been sorted in main classes, in turn divided in subclasses in which the factors in question are explained. The advantage of having a table of preventive analysis (i.e. the Criticality Report) allows to evaluate with more reliability the time and costs of carrying out of an intervention before the tender, by reducing the contentious during the works and, above all, by avoiding accelerations or "inappropriate tricks" for the attainment of expected quality and safety that may become necessary in order to respect the contract "at any cost".