Actor-Based Modeling design intentions on BIM systems

BIM systems, nowadays, are widely used by national and international standards that encourage their use, in order to ensure the transmission and sharing of information between operators involved in design and building construction. However, the great potential offered by the simulation of physical behavior and the use of building organisms do not yet correspond to the ability to manage and explain the motivations that informed the choices made. Techniques related to the so-called "digital construction" are unable to integrate into models the objectives requested, the set of rules adopted and, above all, the trade-offs fulfilled by the designer in order to reach a solution that, as (H.Simon, 1962) stated, is satisfying. Today, the aim of many researches is to make this type of project-related knowledge explicit, transmissible, as it were familiar with what is happening today for graphical information. In order to achieve a system capable of overcoming this kind of limitation, a prototype of a proactive system based on the paradigm of ‘Actors’ is able to represent and make operational objectives and constraints. The realized prototype represents a advanced-logical extension of clash detection, currently used in BIM systems: indeed, these are limited to geometric interferences, whereas this system allow logic detection on design choices, working on non-graphical information. In the other hand, the proposed system can be used by people involved in the construction process to check the choices made regarding a set of constraints, explaining the motivations of the choices made and suggest any alternatives and possible solutions.