Rafael Álvarez Loranca
Ingeniero de Caminos, Canales y Puertos
Advisory (28001 Madrid)

ABSTRACT
Today it is very important to know what the cost of the life cycle of a firm road or highway, for example an administration or a company that tries to access a concession contract how.

The article describes the methodology that can be followed to perform the calculation including, if so desired, user costs described.

An important aspect is the statistical treatment of the problem. a deterministic calculation with unique values ​​for data input and output, where the variability of the parameters involved in this type of process is not contemplated is currently practiced.

Enter in the processes taking place around the existing road actual variability is a step forward that sooner or later have to give.

Keywords: Firm, Lifecycle, Cost, Statistics, Probability, Construction, Maintenance, Rehabilitation.