With the fast development of design computation technique, complex computation models have been employed in architecture design to facilitate sophisticated design decision making and data manipulation.These computation models have enabled designers to work with highly complex geometry and huge amount of data to explore a whole new design field that is hardly achievable without computation techniques.However, most of the current design computation models follow an automation oriented paradigm that work solely with strictly defined problem solving and optimization, but fail in establishing an intuitive and efficient communication with designers.This lack of communication and the inefficiency of translating perceptual design judgments into computer language naturally leads to an unconscious rejection of non-parameterizable design factors and reduced the design computation model to a specific design problem solver instead of a design partner to its full potential.This paper presents a non-deterministic design computation modeling approach derived from the discussion of quantum design paradigm, that employs real-time user communication as the co-driver to evolve the actual design output.A case study of QPC Toolset, the core design computation model of QuantumPointCloud workshop will be presented.