ABSTRACT
As a response to new needs in the field of rehabilitation and the improvement of existing buildings in Switzerland and in Europe, many models have appeared and are still being developed [3] [5]. MER deals with housing in particular. Its aim is to maintain security, salubrity, and to improve the usual comfort. This is done, particularly by making an aiddecision-method based on the diagnosis of the building taking into account its state of disrepair which tells about degradations and lacks in order to select some appropriate, economical means of rehabilitation and then restore the use of collective housing building.
