Standards and Tools for the Guarantee of the Reliability of the Intermediate Product in Building

The paper presents a study for the reliability of building intermediate products. The problem is acting so that evalutative protocols of durability be part of the elements usually considered necessary for a "complete technic and economic definition of the object of contract".This has been translated in the definition of an assessment and validation instrument by the application, in experimental way of the "Factor Method".On the basis of the aims expressed the activity of improvement has concerned in particular the Factor A - Quality of Components for what a first level of structure of basis knowledge of the behaviour of single materials used of technological solutions, has been constructed.