measure the quality of a service provided by taking
only into consideration the number of hours of supply
is not enough. The introduction of data on pressure
provides us with a more appropriate picture of the
reality. It also gives a better understanding of the
demand while underlining the importance of the concept
of service which is differentiated according to
users and usage. Mostly, it raises the question of the
social cost of deficient infrastructure for the community.
Hence, to comprehend the multidimensional
aspects of infrastructure is undoubtedly a major step
for a better definition of public policies.