||The Information System of Building Components -ISBC, consists of a set of activities to control the graphic data operation procedures of building plans and its storage in a data base. The system is specially prepared to be used by architects, engineers and cad operators who are dealing with a continuous flow of design problems, regarding the permanent adaptation and modification of office's layout in a great amount of buildings around the country. These constant changes bring out several types of architectural design problems that should be taken into consideration by the proposed system, particularly the reallocation of office furniture and the modification of building components. Therefore, the principal goal of the system is based on the inquiry and permanently updating of the data base composed by: furniture, technical equipment (computers and telecommunications networks), lights, air-conditioning, sanitary equipments and any other equipment that can be inventoried. The generation and operation of great amount of graphics and alphanumerical information bring out severe data inconsistency problems, particularly when graphic data is envolved. The task of "feeding" and modifying a data base produces errors that aren't easy to solve, even when specific consistency procedures are used. The ISBC provides the computer routines for the initial task of building up the required data base of each building, allowing to use an interactive algorithm among the digitized plans of each office and the data base of the enquiry system. An additional operation included in the system allows to compute the area of each section of the building in order to calculate several types of working spaces regarding ergonomical and functional performance specifications established by law regulations.