According to the post-structuralism in architecture, the decomposition presented as a mechanism to deals with architectural form. I like to know the effect of such mechanism, at least the perception act.
Decomposition itself does not contribute to design creativity. However, the process (either by man or by computer) which tries to decompose architecture correctly or reasonbly, may create knowledgeor new knowledge. I would say decomposition is a learning process.
The decomposition movenment in 80s and 90s, was to reconsider the relationship between shape (or geometry, form, or the physical aspect of architectures) and its meaning (or function, or use). Re-establish a map between the two leads to novel design.
I have tried used comupter to decopmose buildings and then recombined them:Article A case-based design with 3D mesh models of architecture
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Article A Bi-Directional Procedural Model for Architectural Design
Peter Eisenman applied decomposition as a mechanism when he designed “Ten Houses“ . The perception act is completely different as the design offered multi layers to perceive the architectural form. I think the decomposition is a representative of post- structuralism and as a step toward deconstructivism architecture.
I think besides seeing it from a form/geometry oriented perspective it also has a lot to do with the psychology of the inhabitant.
Since 80s, architects have developed an inclination towards prioritizing the human notion of how it FEELS and the Spatial comfort of a structure which has a unconsciously positive effect on the user. I think architects, have since then aspired to touch the user on a deeper level than just through the aesthetic value of the architecture.
I think decomposition in architecture has provided the architects with just that - a new dimension of human sense to explore.
"Decomposition," a term that covers a range of 1980's architectural fashions, is at best a technique or approach to designing things. I see no evidence that it either "increases" or decreases "creativity" any more than another approach to design.
“Decomposition” is a tactical and critical stage between structuralism and deconstructivism in architecture. See the trials of Peter Eisenman when he designed many houses using decomposition to develop architecture language.
Eisenman has used decomposition as a part of design process but it doesn't cause creativity necessarily. I mean there might be a kind of correlation between the implementation of decomposition and creativity but correlation is different than causality. Nevertheless, even if we want to claim the existence of such correlation, it is required to perform an in-depth complex data collection and analysis first.