

BuildComputer Aided Floor Planning. 12Sep2019 AboutOne day, a friend of mine (an architect) told me, that one of their daily tasks is to estimate the value of a building site by creating a rough design of a hypothetical building and calculate its net internal area (NIA). This design does not have to be fancy but it should be reasonable. This is quite obviously a task to be given either to a trainee or even better to a PC. I took that as a challenge and started studying methods to automate the design of floor plans, hoping to find a proper solution. Goals
Results
ConclusionsStudying the subject I made the following conclusions: There are lots of interesting approaches, but none which can actually generate reasonable floor plans without significant support by the user. Finding an optimal solution to a given set of constraints for a floor plan is a socalled NPComplete problem, which means that the processing time will just be impractical for the task. Therefore, I went for a semiautomated approach: The computer constantly tries to improve solutions and the user can interactively select sets of solutions for further improvement. Once satisfied, the user can stop the process, export the result and work on that. The practicability of such a semiautomated system seemed questionable to me. Usually the architect has a library of building designs from recent projects and could just take one of those floor plan designs and adapt it to the given conditions. This might be just faster then working with such a semiautomated planning system. A rough estimate for the implementation of the outlined system suggests about a year for a prototypical implementation. Considering my concerns about its applicability, the risk was just too high and I set the project on hold until I find a better solution.
Holger Machens, 12Sep2019

