Starting from an experience of Steria in the exploitation of freeways,
this survey describes problems encountered in the field of supervisio
n computerized systems which not only involve a knowledge of the syste
m architectures but also require the ability to undertake on-site inte
gration. After a brief functional description of the project, the seco
nd part of this survey deals with the development process used for suc
h systems and their associated integration characteristics.